Don't know what you have tried but I highly recommend tea tree oil. You can either buy the shampoo already with it or just put a huge dose of the tea tree oil in something live olive oil. Wrap their head in glad wrap and let it work a while. It does take more than one dose and unfortunately you still have to nit pick. My friend's dd had lice and this was the only thing that helped. Good luck. I hope you are soon lice free.
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