I Love Grapefruit Seed Extract (GSE) for its versitility and effectiveness. Does GSE kill fleas? My upstairs neighbor has a flea problem and bombed last week. The bombs didn't work completely, but did force them into my apartment. We were discussing the need to do something at the same time (bombs-yuck) I am comtemplating trying GSE before I agree to poisoning my home. Should I mix it with water or alcohol? anyone have staining issues? (the info I found suggests 50-100 drops in a quart of water) help, I don't want myself or my children bitten by bugs or poisoned!