I don’t know why but this seems to work and I’m glad it does! I’ve had a horrible problem with those little gnats that hang around the kitchen. I cleaned eveyr possible surface, didn’t keep fruit out, used Clorox wipes… I just don’t know what they’re still after! Then I read somehwere… mix equal parts of lemon scent dish detergent and apple cider vinegar. Since doing so, I’ve seen ONE gnat! And it was dead in the cider/soap mixture! IF this is an issue at your house – try it! You’ll be amazed!