STEP 1: Apply Licener shampoo to dry hair. Use sufficient shampoo to cover all of the hair. Depending on the length of hair one entire bottle of Licener may be required per person. Massage Licener shampoo well into the hair and cover all hair from the scalp to the tips and then leave it in the hair for 10 minutes. If a number of family members have head lice you should try to treat them all on the same day with Licener in order to prevent new infestations. STEP 2: Rinse out the Licener shampoo. Rinse the shampoo from the hair thoroughly using lukewarm water. Avoid getting shampoo in the eyes as, like all other shampoo, this can lead to irritation of the eyes. It is not necessary to wash the hair with a normal shampoo after treatment with Licener.