There are many home remedies out there that, for the most part, simply don't work and can be dangerous. Gasoline or kerosene is dangerous because of the possibility of ignition and inhalation of fumes. Methods using tea tree oil, olive oil, petroleum jelly, margarine or mayonnaise are messy, time-consuming and inconvenient. Head shaving is unnecessary and would probably upset your child. As for garden insecticide sprays, they are very dangerous for your family, including your family pets.