Just want to shop "Hedrin" as totally useless. I spent £25 on the B*!!? stuff to treat my family, followed the instructions to the letter... a day later, our hairdresser discovered a live louse in my DD's hair... v. embarrassing. DO NOT waste your money on Hedrin. As a seasoned, and now skint, mum of 3 I would agree with the combing advice. There is also a mix of essential oils you can buy online called "nitmix" which you can add to any good leave in conditioner which seems to stun the little critters making them easier to comb out. Comb, comb, comb and comb again, and don't waste your money lining the pockets of the chemical giants.