We have had headlice in our house in a kind of relapsing/remitting cycle for months. Ds's teacher said she hasn't worn her hair down all year as so many kids in the class have it, and dd1 has been re-infected several times.
I have never been sure that I got all the eggs out of the hair (though believe me I tried - conditioner, nit-napalm, combing and combing and combing and picking out with my fingernails on a daily basis!!)
I did a MN search yesterday afternoon as I was at the end of my tether after finding yet another live on on ds! (I do suspect there is someone in his class who is not treating at all). I saw the Nitty Gritty comb advised and dh got one on the way home from work.
I wet combed last night and this morning - and tonight there is not a nit or a moving beastie to be seen!!! I was amazed at what came out of my own hair as well, and combed dh too. Washed all the pillowcases and pillows too!
We might finally be NIT FREE!!!