The BIZ NIZ treatment consists of 4 treatments in a 10 day cycle (day 1, day 3, day 7, day10) which works in conjunction with the life cycle of the head lice, allowing all eggs present to hatch and 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 and only found very close to the scalp. The conditioner must be left on between treatments. A metal comb is necessary. Plastic ones are useless.