Essential oils can kill lice and ease itching.without using harsh chemicals.

First comb out hair with a fine tooth lice comb getting as many live lice and nits as possible.

Combine:

20 drops tea tree oil 
15 drops rosemary
15 drops lemon
15 drops thyme

Mix with 4-6 tablespoons olive oil.
Massage mixture into dry hair, cover
with a plastic shower cap and leave for an hour before shampooing out.

Remember to wash all clothing and bedding and dried at the highest heat. Spray couches, mattresses and the head rests in your car.    –     Do a test on fabrics before spraying fully. –   Stuff animals should placed in a plastic trash bag, tied tight and left for 60 days.