Licenders lice removal products do not contain any harsh chemical additives, and are non-toxic. The Licenders line includes a family of products that are guaranteed to be effective 100% of the time as a lice treatment. Customer support and educating the customer is our number 1 priority. There are 2 ways for the customer to learn how-to-use the product line for maximum effectiveness: 1. Online Training Videos available at the Licenders' website & on you-tube; 2. Live Customer Service Advice at 212-759-5200