Kill gnats in kitchen


How To Get Rid of Gnats for Good

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Frustrated by buzzing creatures following you around the house? Our guide will teach you both how to get rid of gnats and how to prevent future infestations.

Reviews by This Old House Reviews Team 11/14/2022 12:00 am

Gnats are small flying insects that include fungus gnats, fruit flies, and drain flies. Fungus gnats are dark and have long legs, fruit flies are brown and round, and drain flies have moth-like wings and are attracted to water. Because gnats breed frequently, addressing an infestation promptly is crucial.

In this article, we explain where gnats come from in the first place, give step-by-step instructions for five effective ways to get rid of gnats, and outline tips to prevent another infestation. For homeowners who want fast, high-value results, we also recommend the Katchy Indoor Insect Trap for treating these pests.

How Do Gnat Infestations Start?

Typically, gnats will enter your house from the outdoors through cracks or holes in your foundation, walls, windows, or doors. Gnats often infest trash cans, rotten fruit, and other moist places where decomposing organic matter exists. They can also be found near sinks, drains, and toilets.

 


 

5 Ways to Get Rid of Gnats

There are multiple ways to get rid of your gnat problem, from traps to professional help. If you have a severe gnat infestation, it may take more than one of these methods to eradicate the pests.

1. Make a DIY Gnat Trap

Trying to figure out how to catch gnats? The most popular option is a vinegar trap, which is simple and cost-effective to create. Simply place a few tablespoons of apple cider vinegar, a few drops of dish soap, and a tablespoon of sugar in a bowl and stir. Set your bowl in an area where gnats are prevalent, such as your kitchen or bathroom. The sugar and apple cider vinegar combination will attract gnats, and the dish soap traps the gnats and eventually causes them to drown.

If you don’t have apple cider vinegar on hand, a combination of red wine and dish soap can create a similar gnat trap. If your gnat infestation is particularly intense, you may want to set out a few bowls of this wine trap mixture around the house.

Finally, a fruit trap can prove effective. Homeowners can cover a jar of overripe fruit with plastic wrap and poke small holes into the wrap’s surface. The gnats will smell a food source and enter the jar, becoming trapped.

2. Use a Spray

If you have a smaller pest problem, a simple spray bottle of one tablespoon of vinegar and a small amount of dish soap may be enough to treat your issue. If gnats are hovering around houseplants or crawling in your potting soil, the issue is likely due to overwatering. To treat this type of gnats, spray a gentle insecticide, such as neem oil or dish soap diluted in warm water, onto the plant. If you use dish soap, you’ll need to carefully wash the solution off after two hours.

3. Bleach Your Drains

If you notice gnats around your kitchen sink or bathtub, pour a cup of diluted bleach down the drain to kill the gnats. Be sure to pour the cup of bleach down each drain or garbage disposal very slowly until there are no more gnats in your line of sight.

4. Make a Candle Trap

Place a candle in a candlestick and fill the holder partially with water. Light the candle and turn off the lights. The gnats will flock to the flame and be burned or will fall into the water and drown. Obviously, this trap is less convenient than a wine or vinegar trap, and you’ll need to remember to blow out the candle before falling asleep.

5. Hire a Professional Pest Control Company for Gnat Extermination

If you have a lingering gnat infestation, a professional pest control company can help address it. The best companies have expertise in treating gnat larvae and adult gnats and will create a customized treatment plan for your home at a reasonable cost for pest control.

 


 

How to Prevent Gnat Infestations

Once you have treated your gnat infestation, there are a few tips to help prevent a future infestation.

  1. Clean up food and drinks after meals: Don’t allow food or drinks to sit out after meals and clean up any food or drink spillages shortly after they happen.
  2. Take out your trash every night and use a sealed trash can: Gnats are often attracted to items in the trash. By taking out your trash nightly and using a sealed trash can, gnats will be less likely to enter your home and gather around your trash.
  3. Water plants with less frequency: Only water your indoor plants when necessary. If you overwater your plants, gnats may use the area for moisture and to lay eggs.
  4. Put fruit in your refrigerator: Because gnats are attracted to the smell of fruit, leaving fruit exposed on your counters can attract gnats. Place your fruit in the refrigerator instead of leaving them out.
  5. Remove humidity inside and outside your home: Homeowners should repair plumbing leaks and sink drain stoppages. To prevent outdoor gnat problems, clean up any damp areas around rain gutters and birdbaths.
  6. Set up preventive yellow sticky traps: Place these near any trouble areas, such as near ripe fruit or houseplants, to keep an infestation at bay.
  7. Keep your drains clean: Perform regular drain maintenance with diluted bleach or a specialized cleaning solution to keep them free of food particles and fungus gnat larvae.
  8. Don’t overwater plants: Indoor plants are often home to gnats, and overwatering them leads to damp soil that’s the perfect breeding ground for an infestation. Ensure your plants are in a pot with a drainage hole, and cut back on your watering schedule if you notice gnats buzzing around your houseplants. Since they can also carry gnats into the home, check any new plants thoroughly for gnats before bringing them into your household.

Our Conclusion

Homeowners who wish to save time and frustration can work with a professional pest control provider. The This Old House Reviews Team evaluated every major pest control company in the industry and found that Terminix and Orkin provide the best service to homeowners across the country.

Both of these companies will implement a customized treatment plan for your home and educate you on ways to prevent a future infestation. We always recommend getting quotes from at least two companies to ensure you’re getting the best price on your service.

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The This Old House Reviews Team backs up our pest control recommendations with a detailed rating methodology that we use to objectively score each provider. We review pest control plans, navigate the provider website, speak with customer service representatives by phone and online chat (if available), request quotes, and analyze customer reviews for each provider. We then score the provider against our review standards for plan options, additional benefits and convenience factors, availability, trustworthiness, and customer service to arrive at a final score out of 100.

To share feedback or ask a question about this article, send a note to our Reviews Team at [email protected].

How to Get Rid of Gnats

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Black Flag Use fly paper.

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There's really no solution more trustworthy—or oddly satisfying—than fly paper, which simply catches flying bugs on its sticky surface. You can either hang "ribbon fly paper" from areas in your home that get a lot of gnat traffic or try window fly paper, which will cover an entire window in an adhesive sheet.

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KATCHY Original Indoor Insect Trap Try a bug zapper.

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Although it works better with larger bugs (such as mosquitoes), a bug zapper is always a good option. Nowadays, there are plenty of brands and designs that are safe to use indoors, such as the KATCHY device pictured here. These noiseless machines should be able to catch the majority of gnats and flies in your home, and the best part is, you won't have to lift a finger to make the magic happen.

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Bragg Make a trap using apple cider vinegar.

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In a small bowl, mix a half cup of warm water plus two tablespoons of apple cider vinegar, a tablespoon of sugar, and about six drops of liquid dish soap. Gnats will be lured in by the sugary mixture, but once they dip in for a drink, the sticky dish soap will trap them. Simply place the bowl with solution in the areas where you've noticed the most gnats, and wait for results.

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Hot Shot Buy a chemical spray.

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If things get really bad, you may find yourself in need of a more serious bug killer. Insecticide is one option, though we caution against using it if you have small children around (and as always, you'll want to be sure you're following manufacturer directions). This Hot Shot Kitchen Bug Killer is one option that specifically targets gnats, in addition to several other household pests.

5

Pour boiling water down your drain.

Kitchen sink drains are common spots where gnats lay eggs, especially in garbage disposals. They love the warm, moist environment and any food and bacteria build up that occurs there. Kill any eggs in your drain by pouring boiling water in the sink.

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6

Use a wine trap.

Now, we're not asking you to sacrifice your wine collection to kill gnats! Instead, for this nifty trapping trick, you'll want to use an expired wine—one that's nearly turned into vinegar. You can use it in nearly the same way that you used the aforementioned apple cider vinegar trick: Pour some of the stale wine into a small vessel, add in a couple drops of dish soap, then place the mixture in gnat-filled areas of your home and wait for the bugs to drop in.

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Here's a trick that seems almost too good (and easy and old-school) to be true: Place a tall candle into a candlestick, then place the candlestick into a small pan filled with water. Turn off all the lights, then light the candle and wait for gnats to make their way to the flame. They'll either hit the flame itself or fall into the water below. As with any lit candle though, you must stay in the room and attend to the flame with caution until it's time to blow it out.

8

Lure them with rotten fruit.

Yes, the very thing that caused the infestation in the first place might be your best bet when it comes to ending it. Add a few pieces of overripe fruit to a large bowl, then cover with plastic wrap and secure with a rubber band. Use a toothpick to poke a few holes in the top. Soon, gnats and fruit flies will flock to the fruit, making their way in through the tiny holes—but they won't know how to find their way out.

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The Clorox Company Try a diluted bleach solution for drain flies.

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The Clorox Company Try a diluted bleach solution for drain flies.

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If you've noticed that the gnats in your home are converging around your sink drains, they may actually be drain flies (in which case, the other traps we've discussed here may not work well for eliminating them). Drain flies are best dealt with using bleach. Protect yourself and your lungs properly, then dilute one-half cup of bleach with about one gallon of water and pour it down the affected drain.

Amy Mitchell

Amy Mitchell is the managing editor at Country Living Magazine. She writes about a wide range of topics, including homes and lifestyle content.

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