Urgh! This is a topic that is just not spoken about enough!! So, Lice LOVE clean hair so it has absolutely nothing to do with hygiene. Infarct, the healthier and cleaner, the better! There are many herbal remedies out there but the only things that really work are the hectic pesticides and I have discovered that peroxide does the trick too, so dying hair also works. I have three kids so it spreads through my home like wildfire!