The Tea Tree Oil shampoo and conditioner does work. We use one with mint oil added too. Wash, rinse, conditioner, rinse then comb through when wet. Combing only takes a short time, about 5 or 10 min per child. After the visitors have been cleared out, keep it up every couple of weeks as a precaution. Glad to say we havn't had an infestation for over a year now.