N.A.
I have five children, they are all in school. I have done nothing but fight lice since we moved to the area. I have done everything, but what I found to work the absolute best, is that you use the shampoo. Then dry the hair, place cholestrol (you can find it in the ethnic hair product section), liberally on the entire head, then heat it with a hair dryer to activate it. Wash it out and blow dry the hair, then use the nit comb. I have found that the lice and nits come out much easier when the hair is dry, and the cholestrol makes the hair slick which doesn't allow the eggs to stick to the hair follicle. This has to be done at least twice in the first week, and then once a week for 6-8 weeks. Lice is a bug, and you must break it's cycle of life in order to stop it. Wash everything in hot water, dry on hot heat (the heat kills eggs) and bag all stuffed animals and things that can't be washed for at least one month. Vacuume numerous times a day and make sure you wash the bedding and clothes as often as possible. This is a hard thing to get rid of, and it spreads to everyone. Boys are easy, you shave their heads, but you can't exactly do that with girls. If you have more than one child, make sure they all have thier own brushes and hair ties...that will cut down on the passing of the lice. Also book bags and coats have to be washed as well. The spray in the stores is expensive and really doesn't work, look at the active ingredient (don't have a bottle handy) then find another bug spray (usually for ants, fleas, roaches, ect. and use it instead. They work better because they have a higher amount of the same active ingredient. Try that.