Try to get yourself a natural head lice remedy, one that contains Neem Oil. The Neem tree is native to India, is known as the ‘Cure All’ tree and has been used as a natural insecticide for thousands of years. When you mix this with other natural ingredients that kill both lice and nits you have a totally safe treatment.
If you want to suffocate the live lice coat your hair in baby oil, put on a showercap and leave it on overnight. Put on a sweatband to stop the drips. This will suffocate them.
In the morning straighten your hair with hair straighteners to pop the nits. Repeat this in 7 days to catch any nits that hatch that you missed. Use mousse or hairspray every day to simulate 'dirty' hair which lice find hard to attach to.
We got hold of a book called 'Live Lice Free - The Head Lice Handbook.' This had everything we needed to know to get rid of head lice. Their remedy worked for us and killed all the nits and lice.
Hope this helps.