This is a 15 minute anti lice treatment designed to rid your hair of lice or nits. Effective treatment with tea tree oil against lice and nits. Anti Lice works by physically suffocating lice and nits. Effective after a single 15-minute treatment. Distribute anti lice evenly throughout the dry hair and scalp covering the entire hair and allow it to remain for 15 minutes. Leave hair to dry. Next, without wetting the hair first, apply Hair Rinse shampoo to the entire hair and scalp. Rinse thoroughly with warm water.