My daughter and I have been fighting to get rid of her head lice for 2 months. I tried rid, nix, 2 different prescriptions, tea tree oil, and mayonaise. None of it worked. Those buggers were resistant to everything! I then remembered how well the garlic oil cleared up my bunnies mites, so I tried it in her hair for almost 15 hours and the next day was her first day nit free in 2 months!! She and I both agree that it was the easiest and only treatment that worked!