Live Nits remaining in the hair can hatch. Although most nits immediately wash out of the hair with the final rinse after using Schooltime Shampoo as directed, any pieces of dead eggs or shells can look unsightly in the hair and may even result in your child being sent home from school by the nurse following ‘no nit’ policies enforced by their school system. Doing a comb-out while Schooltime Shampoo is in Wet hair (before final rinsing or a small amount applied after final rinsing) or using Spray Away on Dry hair will assure all nits are removed during combing and hair is 100% clear.