The BIZ NIZ treatment consists of 4 treatments in a 10 day cycle (day 1, day 3, day 7, day 10) which works in conjunction with the life cycle of the head lice, allowing all eggs present to hatch & therefore be combed out before they are old enough to reproduce. The WHITE bits glued to the hair shaft are empty shells. Live eggs are black & only found very close to the scalp. The conditioner must be left on between treatments. A metal comb is necessary. Plastic ones are useless.