Used according to the instructions, clinically proven Full Marks Solution and removal comb can kill head lice and helps eliminate eggs. Unlike traditional head lice treatments which poison the lice, Full Marks Solution has a physical action on the lice causing them to dehydrate (lose water) and die. They can then be removed along with any eggs using the Full Marks removal comb supplied. Each application requires approximately 50 ml of solution to treat a head lice infection on one head. However, you should apply enough to cover scalp and hair from root to tip. Long and/or thick hair may require more solution.IngredientsCylcomethicone, Isopropyl myristateDirectionsThree simple steps to kill head lice and help eliminate their eggs. For adults and children from 2 years.Step 1: Detection - the only way to confirm a head lice infestation is by finding a live moving louse on the head. This can be done with the specially designed Full Marks Detector Comb. Weekly detection is recommended for ongoing prevention.Step 2: Treatment - you should apply enough solution to cover the scalp and hair.First, comb through dry hair with a normal comb to remove any tangles. Shake the bottle and apply the solution to dry hair by applying the solution close to the root. Ensure the entire scalp and hair are fully coated with the solution. Massage in and leave on the hair for 5 minutes. Remember, if someone in the household has head lice it is recommended that all members are checked as head lice are spread by close head to head contact. Treating everyone with head lice on the same day will minimise the chances of re-infestation.Step 3: Removal - after 5 minutes comb through the hair using the fine metal toothed Full Marks Removal Comb provided to remove dead lice and any eggs. Safety WarningThis treatment is not a water-based shampoo. Keep hair away from any naked flame or heat source and do not smoke whilst using this product. Please read the enclosed instruction leaflet carefully. For external use only. Keep out of the sight and reach of children. Do not use the comb if it is broken or the teeth are missing.UK/FM/0418/0004