Start with an over the counter shampoo, lotion, or cream. Use the lice comb that comes with the kit to help get them out of your child's hair. Check back 12 hours later and see if there are any lice.

But viewing the combs at 10 times normal size revealed their true purpose: Many still bore traces of the lice and nits they had extracted from someone’s tresses. In pre-Columbian times ...