16 Easy Ways to Get Rid of Gnats Indoors and Out

Few household pests are as persistently annoying as gnats. These tiny flying insects seem to appear out of nowhere, buzzing around your face, hovering over houseplants, or swarming near your fruit bowl. If you’re currently waging war against these minuscule invaders, you’re not alone—and more importantly, you’ve come to the right place.

As someone who’s battled numerous gnat infestations in my own home, I understand the frustration these tiny insects can cause. The good news? You don’t need harsh chemicals or expensive exterminators to reclaim your space. With some simple household items and preventative strategies, you can effectively eliminate these unwelcome visitors. In this article, we will explore 16 effective methods to get rid of gnats in the house and outdoors.

What are Gnats?

Gnats are small flying insects, typically measuring about ⅛ inch long, that belong to various species of small flies that tend to swarm in large numbers. According to Kyle Morgan, owner of Care Pest Pros in Spicewood, Texas, these bugs are primarily a problem outdoors during spring and summer, but they can inhabit indoor spaces year-round.

The good news is that adult gnats typically live for only about a week. The bad news? During that brief lifespan, females can lay approximately 200 to 300 eggs in damp materials. These eggs mature into larvae, transition into pupae, and finally emerge as adults.

Depending on the species, a gnat’s entire life cycle can be completed in as few as three weeks. This allows populations to multiply rapidly if not addressed.

Common Types of Gnats You Might Encounter

Several species of small flies fall under the general category of “gnats,” each with their own distinct characteristics:

Fruit Flies: Recognizable by their big red eyes and tan or black oval bodies, these pests are attracted to ripening or fermenting fruits and vegetables.

Drain Flies: Typically light gray or tan with a distinctive moth-like appearance, drain flies congregate around sink or tub drains and other moist areas.

Fungus Gnats: Dark gray or black with elongated mosquito-like bodies, these typically infest houseplants and are attracted to damp soil.

Phorid Flies: Sometimes categorized with gnats, these can be black, brown, yellow, or a combination. They are distinguished by a hump on their thorax.

How to Get Rid of Gnats In the House

1. Deploy DIY Apple Cider Vinegar Traps

One of the oldest and most consistently effective tricks in the book for adult gnats (especially fruit flies and fungus gnats) is the simple apple cider vinegar trap. It’s cheap, non-toxic, and incredibly satisfying to see in action.

Gnats are irresistibly drawn to the fermenting smell of apple cider vinegar. Once they land in the mixture, the dish soap breaks the surface tension, causing them to sink and drown.

What you need:

• A small bowl or jar
• Apple cider vinegar (any kind will do)
• A few drops of dish soap
• Optional: a pinch of sugar

Instructions:

1. Pour about an inch of apple cider vinegar into the bowl or jar.
2. Add 2-3 drops of liquid dish soap.
3. Stir gently to mix (don’t create too many suds).
4. Place the trap near gnat hotspots – next to fruit bowls, houseplants, or kitchen sinks.
5. Change the solution every few days for maximum effectiveness.

“I was skeptical at first, but after just one night, my apple cider vinegar traps were full! It’s astonishing how well something so simple works to get rid of gnats.” – Happy Homeowner

This method is fantastic for catching existing adult gnats, reducing their numbers, and preventing further breeding.

2. Embrace the Power of Sticky Traps

Sticky traps are another brilliant, non-toxic weapon in your arsenal to get rid of gnats. These bright yellow cards are irresistible to gnats, which are attracted to the color. Once they land, they’re stuck for good.

Types of Sticky Traps:

• Yellow Sticky Traps: Most common, excellent for fungus gnats around houseplants.
• Fly Ribbons/Strips: More traditional, good for general flying insects in larger areas or outdoors.

How to Use Them:

1. Indoors: For fungus gnats, place yellow sticky traps directly in potted plants, either by sticking them into the soil or hanging them just above the foliage. You’ll be amazed at how many gnats they catch in just a few days.
2. Outdoors: Hang fly ribbons in areas where gnats congregate, such as near outdoor dining areas, sheds, or around compost bins.

Pro Tip: While sticky traps are great for reducing adult populations, remember that they don’t address the larvae in the soil. Combine them with other methods for a comprehensive approach.

3. Mix Up an Insecticidal Soap Spray

For a more direct hit on gnats, especially fungus gnats on plants, an insecticidal soap spray can be highly effective. This method targets both adult gnats and their larvae without harming your plants or pets (when used correctly).

How it works: The fatty acids in the soap break down the insects’ exoskeletons, dehydrating and killing them.

What you need:

• Mild liquid dish soap (avoid soaps with degreasers or harsh chemicals)
• Water
• A spray bottle

Instructions:

1. Mix 1-2 tablespoons of mild liquid dish soap with 1 quart of water in a spray bottle.
2. Shake well to combine.
3. Spray the top surface of the soil of infested plants until it’s thoroughly saturated. This targets the larvae.
4. You can also lightly mist the foliage to catch adult gnats resting on the leaves.
5. Repeat every 5-7 days for a few weeks to break the gnat life cycle.

Caution: Always test the spray on a small, inconspicuous part of your plant first to ensure it doesn’t cause any adverse reactions, though most plants tolerate mild soap solutions well.

4. Master Proper Watering Techniques

This is arguably the single most important step to get rid of gnats, especially fungus gnats, and prevent future infestations. Gnats love moist, consistently wet soil because it’s the perfect breeding ground for their larvae.

Key Principles:

• Let Soil Dry Out: Allow the top 1-2 inches of soil in your potted plants to dry out completely between waterings. You can check this by sticking your finger into the soil.
• Water from the Bottom (for some plants): For plants that tolerate it, consider bottom-watering. Place the potted plant in a tray of water and let it soak up moisture from the drainage holes. This keeps the topsoil dry, deterring gnats.
• Ensure Good Drainage: Make sure all your pots have drainage holes, and remove any standing water from saucers after watering.
• Avoid Overwatering: It’s a common mistake, but overwatering is the biggest invitation for fungus gnats. When in doubt, err on the side of underwatering.

By simply adjusting your watering schedule, you can make your plants far less attractive to gnats, effectively cutting off their nursery.

5. Introduce Diatomaceous Earth (DE)

Diatomaceous Earth (DE) is a natural, non-toxic powder made from the fossilized remains of diatoms. It’s a fantastic mechanical insecticide that works wonders on gnat larvae and even some adults.

How it works: On a microscopic level, DE consists of razor-sharp particles that are harmless to humans and pets but fatally abrasive to insects. When gnats or their larvae crawl over DE, it scratches their waxy exoskeletons, causing them to dehydrate and die.

How to Use It:

1. Indoor Plants: Sprinkle a thin, even layer of food-grade diatomaceous earth over the topsoil of your potted plants. Ensure the soil is dry when you apply it.
2. Reapply: If the DE gets wet, it becomes ineffective. Reapply after watering once the soil surface has dried again.
3. Outdoors: You can also sprinkle DE around outdoor plant beds or areas where you suspect gnat activity, but its effectiveness will be reduced by rain.

Important: Always use food-grade diatomaceous earth. While generally safe, avoid inhaling the fine powder by wearing a mask during application, especially if you have respiratory sensitivities.

6. Maintain Impeccable Sanitation (Indoors)

A clean home is a gnat-free home. Many gnats, especially fruit flies and drain flies, are attracted to decaying organic matter. Eliminating their food sources is a critical step in getting rid of gnats.

Key Indoor Sanitation Practices:

• Clean Up Spills Immediately: Don’t let sugary drinks or food crumbs linger.
• Store Produce Properly:
  • Refrigerate ripe fruits and vegetables.
  • Store produce in sealed containers or under mesh covers if left on counters.
  • Check produce regularly for signs of spoilage and discard anything overripe.
• Empty Trash Cans Frequently: Especially kitchen trash, which often contains food scraps. Use trash bags and tie them securely before taking them out.
• Clean Drains Regularly: Pour boiling water down drains, or use a mixture of baking soda and vinegar, to break down the organic film where drain flies breed. Consider commercial drain cleaners formulated for organic buildup if issues persist.
• Wipe Down Counters: Keep kitchen counters, tables, and other food prep areas free of crumbs and sticky residues.
• Don’t Leave Dirty Dishes: Wash dishes promptly, or at least rinse them thoroughly to remove food particles.

“Prevention is always better than a cure. A diligent cleaning routine drastically cuts down the appeal of your home to gnats.”

7. Utilize Essential Oils as Repellents

Certain essential oils are known for their insect-repelling properties, and they can be a pleasant-smelling way to deter gnats without harsh chemicals.

Effective Essential Oils:

• Citronella: A classic insect repellent.
• Lemongrass: Similar to citronella, with a fresh, citrusy scent.
• Peppermint: Many insects dislike the strong scent of peppermint.
• Geranium: Known for repelling various flying insects.
• Eucalyptus: Another strong-scented oil that can deter pests.

How to Use Them:

1. Diffusers: Use an essential oil diffuser in areas where gnats are a problem.
2. Spray: Mix 10-20 drops of your chosen essential oil(s) with water and a tiny bit of rubbing alcohol or witch hazel (as an emulsifier) in a spray bottle. Shake well and mist lightly around plants, windows, and entry points. Do not spray directly onto delicate plant leaves without testing first.
3. Cotton Balls: Place a few drops of essential oil on cotton balls and place them near windows, doors, or directly into plant saucers.

Note: While essential oils can repel, they typically won’t kill gnats. They are best used as a preventative measure or in conjunction with other methods to get rid of gnats.

8. Consider Soil Amendments

For stubborn fungus gnat problems in houseplants, modifying the soil itself can make a big difference. The goal is to create an environment less hospitable to gnat larvae.

Effective Soil Amendments:

• Sand Layer: Add a 1-inch layer of coarse sand on top of your potting soil. This dries out quickly, making it difficult for adult gnats to lay eggs and for larvae to emerge.
• Horticultural Grit or Perlite: Mixing these into your potting soil improves drainage, preventing the overly wet conditions gnats love.
• Beneficial Nematodes: These microscopic roundworms are natural predators of fungus gnat larvae. They are harmless to plants, humans, and pets. You can purchase them online or at garden centers and add them to your watering can.
• Mosquito Bits/Dunks: These contain Bacillus thuringiensis israelensis (BTI), a naturally occurring bacterium that is toxic to mosquito and gnat larvae but harmless to other organisms. Sprinkle the bits on the soil surface or steep the dunks in your watering can.

“A double-whammy of a sand layer and letting the soil dry out has completely transformed my plant situation. No more gnats!”

These amendments directly target the breeding cycle within the soil, a crucial step to get rid of gnats long-term.

9. Set Up Outdoor Gnat Traps and Repellents

When gnats are bothering you outside, especially during BBQs or garden relaxation, you need a different set of tools.

Outdoor Solutions:

• Bug Zappers: While they indiscriminately kill many flying insects, they can reduce gnat populations. Place them away from your gathering area to draw pests elsewhere.
• Mosquito Magnets: These devices attract and trap mosquitoes and other biting insects, including some gnats, by emitting CO2 and other attractants. They are an investment but can be very effective for large areas.
• Commercial Gnat Traps: Many garden stores sell specialized outdoor gnat traps that use attractants and sticky surfaces.
• DIY Bottle Traps (for fruit flies outdoors): Cut the top third off a plastic bottle, invert it into the bottom section to form a funnel, and fill the bottom with fruit scraps, beer, or a sugar-water solution. This can trap fruit flies away from your picnic.
• Citronella Candles/Torches: As mentioned, citronella can help deter gnats in immediate areas.
• Herbs: Plant gnat-repelling herbs like basil, lavender, rosemary, and mint around your patio or garden seating areas.

Focusing on reducing stagnant water sources and managing decaying organic matter outdoors (like fallen fruit) will also greatly assist in getting rid of gnats.

10. Install or Repair Window and Door Screens

This might seem obvious, but a simple physical barrier is often the most effective way to keep outdoor gnats from becoming indoor gnats.

Check and Maintain Screens:

• Inspect Regularly: Go around your house and check all window and door screens for tears, holes, or gaps.
• Repair or Replace: Even small holes are an invitation for gnats. Repair them with screen repair kits or replace heavily damaged screens.
• Ensure Tight Fit: Make sure screens are properly seated in their frames and that there are no gaps around the edges.
• Self-Closing Doors: If you have screen doors, ensure they close properly and automatically.

This is a preventative measure that costs little but can save you a lot of hassle in the long run. Don’t let them fly right in!

11. Manage Outdoor Waste & Compost

Just like indoors, outdoor sanitation plays a huge role in preventing gnat infestations. Decaying organic matter is a magnet for many types of gnats and flies.

Key Outdoor Sanitation Practices:

• Seal Garbage Bins: Ensure all outdoor garbage cans have tight-fitting lids. Don’t leave them open.
• Clean Bins Regularly: Wash out your garbage and recycling bins periodically, especially after emptying, to remove residues that attract pests.
• Compost Smartly:
  • Proper Bin: Use a sealed or fully enclosed compost bin to prevent gnats from accessing the decaying material.
  • Balance “Greens” and “Browns”: A well-balanced compost pile heats up properly, which helps break down material faster and deters pests. Too many “greens” (food scraps) without enough “browns” (leaves, wood chips) can lead to a smelly, gnat-attracting mess.
  • Bury Food Scraps: If adding food scraps, bury them deep within the compost pile rather than leaving them exposed on top.
• Remove Fallen Fruit: If you have fruit trees, regularly pick up any fallen fruit from the ground. This is a huge attractant for fruit flies.
• Rake Leaves: Keep your yard tidy by raking up leaf litter, which can create moist, decaying environments.

By being proactive about outdoor waste, you significantly reduce the breeding grounds available for gnats.

12. Increase Air Circulation with Fans

Gnats are not strong fliers, and they struggle in moving air. This simple trick can make an area much less appealing to them.

How to Use Fans:

• Indoors: Place oscillating fans near houseplants or in areas where gnats are prevalent. The moving air will make it difficult for them to fly and land.
• Outdoors: For patios or outdoor gathering spaces, position outdoor fans to create a gentle breeze. This not only keeps you cool but also helps get rid of gnats and mosquitoes.
• Ceiling Fans: Ensure ceiling fans are utilized to keep air circulating throughout your home.

This method works well for immediate relief and as a deterrent during peak gnat activity.

13. Introduce Natural Predators (Outdoors)

If you’re dealing with gnats in your garden or yard, encouraging natural predators can be a sustainable and eco-friendly way to manage their populations.

Beneficial Insects and Animals:

• Beneficial Nematodes: As mentioned earlier, these microscopic worms prey on gnat larvae in the soil.
• Ladybugs: These beloved garden helpers eat a variety of small, soft-bodied insects, including some gnat larvae.
• Lacewings: Larvae of lacewings are voracious predators of small insects.
• Birds: Many bird species feed on flying insects. Attracting birds to your garden with bird feeders and baths can help control gnat populations.
• Dragonflies: These elegant insects are fantastic predators of flying insects, including gnats and mosquitoes.

Creating a diverse and healthy garden ecosystem will naturally encourage these helpful creatures to take up residence and assist in your efforts to get rid of gnats.

14. Control Indoor Humidity

Excessive humidity creates an ideal environment for gnats, especially drain flies and fungus gnats. Controlling moisture levels can make your home less hospitable.

Methods for Humidity Control:

• Dehumidifiers: Use a dehumidifier in basements, bathrooms, or other naturally damp areas of your home.
• Ventilation:
  • Run exhaust fans in bathrooms during and after showers.
  • Use range hoods in the kitchen when cooking.
  • Open windows and doors (if screens are present) to allow for cross-ventilation.
• Fix Leaks: Promptly repair any leaky pipes, faucets, or other sources of unintended moisture.
• Avoid Drying Clothes Indoors: If possible, dry laundry outdoors or in a well-ventilated area to prevent adding excess moisture to the air.

By maintaining a drier indoor environment, you remove one of the key elements gnats need to thrive.

15. Clean Your Gutters and Downspouts

For outdoor gnat problems, don’t overlook your rain gutters. Clogged gutters can hold standing water and decaying leaf matter – a perfect gnat breeding ground.

Maintenance Steps:

1. Regular Cleaning: At least twice a year (more if you have many trees), clean out leaves, twigs, and other debris from your gutters.
2. Ensure Proper Drainage: Make sure downspouts are clear and directing water away from your home’s foundation.
3. Check for Leaks: Repair any leaks in your gutter system that could be creating damp spots on the ground below.

A well-maintained gutter system helps manage rainwater effectively and reduces potential gnat breeding sites around your home.

16. Practice General Garden and Yard Hygiene

Beyond gutters and compost, maintaining a generally tidy outdoor space is paramount for keeping gnats at bay. Think of it as creating an unwelcoming environment.

Outdoor Hygiene Tips:

• Remove Standing Water: Regularly empty saucers under outdoor pots, pet water bowls, bird baths (clean and refill frequently), and any other containers that collect standing water. Even a small bottle cap full of water can be a breeding site.
• Trim Overgrown Plants: Dense, overgrown foliage can create damp, shaded conditions that gnats love. Prune plants to improve air circulation and sunlight penetration.
• Eliminate Weeds: Weeds can harbor moisture and decaying matter, providing refuge for gnats.
• Proper Mulching: While mulch is beneficial, avoid excessively thick layers right up against plant stems, as this can trap too much moisture.
• Clean Up Spills: If you spill sugary drinks or food during outdoor gatherings, clean them up promptly.

“My yard used to be a gnat haven until I got serious about cleaning up fallen leaves and managing puddles. It made a monumental difference!”

By consistently applying good garden and yard hygiene, you’ll significantly reduce the appeal of your outdoor spaces to gnats.

Special Considerations for Different Types of Gnats

Each type of gnat may require slightly different control approaches:

Fruit Flies: Focus on managing ripening produce, cleaning drains, and eliminating all sources of fermenting materials.

Fungus Gnats: Pay special attention to houseplant care, soil moisture management, and using products specifically designed to control soil-dwelling larvae.

Drain Flies: Regular drain cleaning, eliminating standing water in and around sinks, and addressing plumbing issues are key for these moisture-loving pests.

Phorid Flies: Look for decaying organic matter in hidden places like under appliances, inside wall voids, or in crawl spaces, as these flies often breed in unexpected locations.

When to Call Professional Pest Control?

While most gnat problems can be resolved with DIY methods, some situations warrant professional intervention.

• You’ve exhausted all home remedies and can’t eradicate the gnats.
• You can’t locate the source of the infestation.
• The source might be unreachable, possibly requiring opening walls or accessing other difficult areas.

Professional exterminators have access to specialized products and equipment that can address severe or persistent infestations. Notes that while every situation is unique. A one-time service for gnats will probably start around $150.

FAQs

1. What attracts gnats to my home?

Gnats are primarily attracted to moisture, salt, overripe fruits, houseplants with damp soil, spilled food (especially sugary substances), and garbage. They seek out these environments for both feeding and breeding purposes.

2. How long do gnats live?

Adult gnats typically live for only about a week. However, during that brief lifespan, females can lay approximately 200-300 eggs, which can complete their life cycle in as little as three weeks.

3. What’s the difference between fruit flies and fungus gnats?

Fruit flies have big red eyes with tan or black oval bodies and are attracted to ripening or fermenting fruits. Fungus gnats are dark gray or black with elongated mosquito-like bodies and primarily infest houseplants and damp soil.

4. What’s the most effective DIY trap for gnats?

The apple cider vinegar trap is highly effective. Mix ½ cup warm water, 2 tablespoons apple cider vinegar, 1 tablespoon sugar, and 6 drops of dishwashing liquid in a bowl or mason jar. The sweet mixture attracts gnats while the soap traps them.

5. How can I get rid of gnats in my houseplants?

Allow the top inch of soil to dry between waterings, sprinkle diatomaceous earth or dried coffee grounds on the soil surface, use yellow sticky traps near plants, and consider repotting severely infested plants with fresh soil after washing the roots.

6. Do gnats bite humans?

Some species of gnats bite humans and pets, while others don’t. Biting gnats are attracted to moisture and salt on the skin, which is why they sometimes swarm around people’s faces.

7. How do I get rid of drain flies?

Clean drains with a mixture of ½ cup bleach in a gallon of water (with proper ventilation), use enzymatic drain cleaners to eliminate organic buildup, and fix any plumbing issues causing constant moisture around sinks or tubs.

8. Do electronic bug zappers work on gnats?

Yes, bug zappers can be effective against gnats, both indoors and outdoors. For indoor use, choose smaller, less obtrusive models specifically rated for indoor environments. For outdoor use, position zappers away from seating areas as they may initially attract insects before killing them.