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.

Why do gnats go in water?

They are primarily attracted to sweet and fruity scents, but many species of gnats are also drawn to water and body heat, which is why they tend to fly around both people and pets. … Gnats may also live in sink drains where food residue can collect.

What causes gnats to be in your house?

The following are causes of gnats inside your house: Moisture: Moist breeding grounds for gnats include food spillage, moist potting soil, overwatered grass or plants, garbage cans, puddles in kitchen or outside your house, leaky pipes under the sink, and condensation around windows and vents.