Natural Gnat Killer What you will need: 1 small jar or bowl 1/3 cup apple cider vinegar 2 tbs water 1 drop of mild liquid dish washing detergent such as Dawn. Instuctions: Pour apple cider vinegar into the jar/bowl. Add water then add just one drop of mild liquid dish detergent. Set the mixture in the area where gnats are a problem. The gnats are naturally attracted to the vinegar and the drop of soap kills them.
A great way to get rid of gnats on your houseplants is to mix 32 ounces of water with one squirt of Windex. Water your plants by making sure the entire soil surface is wet. It's not necessary to saturate the soil.