The Bane of My Existence

http://en.wikipedia.org/wiki/Head_louse

As you can see from the body structure of a louse, they are physically incapable of jumping, but there are many people, including educated health professionals who think that they do.

We have been fighting headlice since before school started this summer; this is now January. No matter how we treat, what products we use, or how thoroughly I pick, we still have lice. My daughter is 8 and in the 3rd grade. I insist that her teacher allow her to keep her coat on the back of her chair, since they each share their cubby with another child, and I've even notified the teacher that this is an ongoing problem. Part of the problem is that we have another 3rd grader living next door who rides the same bus and comes over to play. I do not know how well, or if, the mother treats her daughters' headlice (there are three girls), but I know for a fact that they have had it.
I spent the better part of today removing lice and nits from my 8-year-old daughter and my 5-year-old son. Oddly enough, neither my 4-year-old nor my 13-year-old has it, even though they share a room and the two smaller ones sleep in the same bed. My husband never gets it either, even though I have gotten it several times, and probably have it now. I am the only person in the house who is competent to remove headlice, which makes it rather difficult when I'm the one who has it.

We have tried three major brands and one store brand lice treatment, tea tree oil, mayonnaise, Dawn dishwashing liquid, and just picking the lice without any treatment. Nothing seems to be working.