What is the best way to get rid of gnats?

Get rid of all spoiled fruit or veggies. .Never leave food uncovered.These are likely Fruit Flies.Wipe down all areas of counter storage with disinfectant and pour down the drains.

You probably have drain flies - you kill them and every few days they lay eggs in your drain and more appear. To prevent future drain fly infestations, clean your drains once a week. Start by dumping 1/2 cup salt down the drain. Then dump 1/2 cup baking soda down on top of it. Follow that with 1 cup of plain white vinegar.

Jar of vinegar cover with Saran wrap,poke holes with toothpick,they will get in under the Saran can't get out and will drown.works every time