Girls, hello everyone. A little off-topic question, maybe someone has …

Girls, hello everyone. A little off-topic question, maybe someone has encountered it. The niece caught pediculosis in kindergarten. We bought a special shampoo, when washing with it it goes away immediately. We comb out with a comb. They read that you can paint with ammonia-based paint, we don't know how to paint all this chemical. Can you tell me what to do? Kindergarten caused disinfection and everything was treated.