G.B.
Please go to headlice.org. Head lice is NO big deal. You get it, you sit and pick out the bugs and the nits, you can use alcohol, all kinds of different ideas, they die. You don't have to do all kinds of radical things.
One thing you can do is buy some Tea Tree Oil and put a couple of drops of it in each bottle of shampoo you buy. It is very very oily so it only needs a couple of drops per bottle. They don't like the smell, let's be honest, I don't like the smell either. It also put too much oil on the hair shaft and they can't stick the eggs to it.