My kids, and whole family, ended up with lice one year after a hospital stay. I used Rosemary/Olive Oil combined and rubbed through their scalp 2 x's/ day. Plus I went through everyones hair daily and hand removed lice and nits. We were lucky that it was winter and we set our pillows and clothes outside every morning too. It took us 2 weeks to get rid of them, I don't think we could have without going through the hair every day. And I think it would have taken longer in the summer. So don't give up! It's so much healthier than causing your child to get cancer, etc with those products!