After trying countless horrid,harsh and ineffective chemical products to combat the on-going head lice war,(and despairing)!I FINALLY hit the jackpot! This is the ULTIMATE head lice prevention system.It is SO unbelievably pleasant,easy and effective to use.Simply add an equal quantity of Neem oil to the shampoo and leave on for the required time,and simply finish off with conditioner,and maintain with a daily mist of the prevention spray.This stuff REALLY works! It's also natural and eco friendly,and works out very cost effective too. If ONLY I had discovered this 30 yrs.ago when I was bringing up my children,instead of my Grandchildren! THANK you SO much the Neem team! You have improved the quality of our lives more than you will ever know x