Repellents: DEET, citronella, vanilla, pine oil, and dryer sheets are commonly used to repel gnats. ... Chemical controls: Foggers, sprays, and insecticides designed for flying insects will work with gnats, although they're not particularly effective in preventing future infestations.

What is the best spray for gnats?

Homemade gnat killer spray: A mixture of half a cup of water, half a cup of isopropyl alcohol, and a teaspoon of dish liquid can be filled in a spray bottle. This mixture can be sprayed on the gnats directly to kill them.

What is the fastest way to get rid of gnats?

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.