I watched the show today about headlice and how to get rid of them. I don't don't think you answered the question completely. There is so  much more in getting rid of them. At home you have the bedding, clothes furniture, carpet and anything else that they come in contact with. I find that the nit comb is a waste of time. And the shampo is way to strong for the safety of the kids. I have to treat my grandkids every time they come to stay and I use one half cup of white vinegar,conditioner and alcohol. Mix together and you put that on for half an hr and wash out. repeat every 2 or 3 days for 7 days until the nits are all gone also. the dryer will get rid of them and if you can't put it in the dryer you can put them in black bags air tight for 2 weeks.