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.
Kill gnats, fruit-flies, black-flies... Pour equal parts Apple Cider Vinegar and Warm Water into a small dish, add 8-10 drops of dish soap (we used Dawn-blue), stir to combine. Set-out near an area where the flies are feeding (away from children and pets)!