Full Marks Lice Solution. A new development in head lice treatment that contains no traditional pesticides. Full Marks Solution is clinically proven to kill head lice in a 10 minute treatment time, has no nasty smell and is safe for eczema and asthma sufferers. Clinically proven to kill head lice. Quick, easy 10 minute treatment time. Odourless. Contains no traditional pesticides. Full Marks Removal Comb included in every pack Apply to dry hair, leave for 10 minutes. Comb through hair with comb provided to remove the remains of lice and eggs. Finally wash out using non- conditioning shampoo. Its that easy. Remember to retreat 7 days later. Can be used on adults, elderly and children over 2 years old. Suitable for people with asthma and eczema Always read the label. With many non-traditional insecticides – including Full Marks Solution – a second treatment, seven days after the first is required. This is to kill any newly-hatched lice which may have been missed in the initial treatment.