Lice get around by crawling this is probably making you scratch your head already, sorry! But the big drawback of pesticide products are the side effects they can have. A sure way to kill lice is by suffocating them. Also called crabs, this variety of lice infestation occurs on the hair and skin of the pubic area. There are several conventional and natural options. Anti-lice shampoos used to be very effective a few decades ago but are now not so powerful anymore, especially because head lice have developed some resistance in many Western countries including United States, Canada, France, and United Kingdom. In a study, among 6 remedies including olive oil, vinegar, butter and mayonnaise, petroleum jelly was the most effective of all, and had some ability to kill eggs, too. You can even do both the washing and the soaking if it makes you feel better. This type of lice develops on the scalp and neck.