For non-toxic head lice treatment, check out these links with non-toxic methods.
1. Four pesticide-free possibilities HERE
2. There are many ways you can treat head lice, though some are more effective than others. The use of olive oil is one such treatment. HERE
3. (from their website:) The Nuvo method is a breakthrough in the diagnosis and treatment of head lice. The Nuvo method was 96% effective even though it involved no neurotoxins and required only minimal household cleanup. The lotion used in the research was Cetaphil® Gentle Skin Cleanser, a widely sold, soap-less cleanser for people with sensitive skin. HERE