To kill gnats in your house effectively, follow these steps combining elimination and prevention:

Kill Existing Gnats

• Use a Vinegar Spray: Mix a few drops of dish soap and a tablespoon of vinegar (apple cider or white) with each cup of water in a spray bottle. Spritz this solution directly on gnats to kill them on contact. This is safe around indoor plants

• Set Vinegar Traps: Fill a container with apple cider vinegar and a few drops of dish soap. Cover with plastic wrap and poke small holes so gnats enter but cannot escape, drowning in the liquid. Alternatively, place ripe fruit with vinegar in a jar and use a paper cone as a one-way entrance

• Pour Boiling Water or Diluted Bleach Down Drains: Gnats often breed in sink drains. Pouring boiling water or diluted bleach down the drains kills eggs and larvae hiding there

• Use Hydrogen Peroxide on Plant Soil: Mix 1 part hydrogen peroxide with 4 parts water and soak the top layer of soil to kill fungus gnat larvae without harming plants

• Sticky Traps and Bug Zappers: Place yellow sticky traps near infested areas to catch flying gnats. Bug zappers with UV light can also attract and kill gnats indoors

• Candle Trap: Light a candle in a small water-filled pan with dish soap. Gnats attracted to the flame will either burn or drown in the soapy water

Prevent Reinfestation

• Do not leave fruit exposed; store it in the fridge or sealed containers.
• Rinse dishes before leaving them in the sink to avoid attracting gnats.
• Avoid overwatering indoor plants and remove standing water.
• Regularly clean drains and remove any organic buildup.
• Maintain cleanliness in kitchens and bathrooms where gnats breed

By combining these methods-targeting gnats with sprays and traps, treating breeding sites like drains and soil, and removing attractants-you can effectively kill gnats and prevent their return in your home

. Repeat treatments as needed since gnats reproduce quickly.