When we had this problem, I used both the chemical method and some natural just to be sure. For my ds, one of his ordinary hair cuts in the summer was to shave it all off anyway; so that's what we did for him--no chemicals needed. But for dd and I, we used the box stuff at the store for the 1st treatment. Then every day, I would go through her hair with the special comb while she watched tv (long hair). And at night dh (he doesn't have any hair), would go through my hair. I would wash all our bedding every day. I threw out any toy that had been out recently that couldn't go into the washer and dryer; any toy in the closets were put in garbage bags for a month. We didn't play with any neighbors until this was all over, so we wouldn't keep giving it back and forth. Then after we did the 2nd treatment of the chemicals (when the eggs would possibly hatching), we did a natural treatment of real mayo, super glopped on (put a plastic bag over your head so it doesn't get everywhere).
BTW--I didn't really like the nit combs. I found that some of the nits where too small for the comb to catch. So, I would just pull out the whole hair (!). I know that may sound crazy, but what was I going to do just leave it in her hair, knowing what it was?
What do those lice have--special super glue to attach their eggs?
Anyway, good luck; I hope you get rid of the little buggers no matter what method you choose!
And I would of totally used that electronic comb if I would of known about it at the time!!