Over-WateringFungus gnats are the #1 sign of over-watered houseplants. Their larvae live in the top inch of damp soil and eat fungi and decaying organic matter.
The SwarmMany gnat species participate in "lekking"—forming large swarms to attract mates. These swarms often congregate near the corners of houses or under trees.
Attraction to SecretionsEye gnats are attracted to the moisture and proteins in human eyes and perspiration, which is why they are so maddeningly difficult to shoo away.
Why are there tiny flies in my kitchen? I don't have fruit out.If they aren't fruit flies, they are likely Fungus Gnats coming from a potted plant or "Gunk" in the kitchen drain.
Do gnats bite?Most "gnats" in Utah do not bite, with the exception of the "No-See-Um" (biting midge), which is occasionally found near water sources in the canyons.
How do I get rid of them in my houseplants?Let the soil dry out completely between waterings. This kills the larvae. You can also place a layer of sand over the soil to prevent the adults from laying eggs.