To get rid of fungus gnats, reduce watering of indoor plants, use sticky traps, and apply beneficial nematodes to the soil. Improving soil drainage will prevent gnat breeding.

Fungus gnats thrive in moist soil, so allowing houseplants to dry out between waterings can help eliminate them. Sticky traps can catch adult gnats, while beneficial nematodes introduced into the soil will kill larvae. Ensuring proper drainage in plant pots will also reduce the chances of fungus gnats breeding. For severe infestations, using insecticidal soaps or natural sprays may be necessary.