[header] How to check a child's hair for lice [title] Wash your child's hair. [step] Be sure to use shampoo and conditioner. The resulting moisture at the root of your child's hair, where lice thrive, may temporarily prevent their movement along the scalp. 
Conditioner will also make it easier to comb through your child's hair. Use a comb containing gaps no more than 0.2 mm.