After you know that every single hair on the head is coated with Delice Shampoo from root to tip, use a shower cap to cover the head for 20 minutes. Take cap off and shower with regular shampoo. After that, lean the head back over a sink or basin and use a lice comb to comb out the dead lice and nits. Make sure when combing that the teeth of the lice comb always touches the scalp while combing to pick up any lice and nits attached to scalp. Comb daily after shampooing to remove dead lice and nits.After you have combed out the hair, shampoo the hair a second time and repeat the steps above. After that blow dry the hair and inspect to make sure there are no more lice or nits that were missed. This product is not approved by the FDA for use as a treatment for head lice since it is made with natural ingredients.