It's all in the combing. I use a product called Lice Breaker which goes on dry hair and is like a conditioner. You leave it on for 20 mins then comb it through before washing it off. It doesn't smell at all, I find it works really well. I also use the same brand of nit comb which I have found is the best out there, it has sprially thingys on the teeth which remove eggs so well.