Apply to the full length of the hair, wait for 20 minutes and comb out head lice and eggs using a Specialist Head Lice Removal Comb. Wash hair using Shampoo and Conditioner. Comb hair again with clean Specialist Head Lice Removal Comb and dry hair with dryer. To ensure all lice and eggs are gone thoroughly check hair under a bright light and remove any remaining eggs manually.