Apply a sufficient amount of Nyda Express on the hair and scalp, enough to saturate all areas, including the area behind the ears and the back of the neck.
Keep the solution on the hair for an hour to work as an exterminator for lice and eggs.
Combing the hair using the fine-toothed comb attached to it inside the box to remove dead lice and eggs.
Leave it on the hair for at least an hour.
Wash hair with regular shampoo to remove traces of the product.
It is preferable to reuse after a week to prevent recurrence of infection.