HELP!!!!! I’m sick of lice!!?

My family has had lice since I was in prep and have had it ever since!!!!
I am sick and tired of having my hair combed every week for 10 years!!!!
This has been an ongoing problem and I have a big family of 7 and my mum is slowly giving up the fight for lice and she doesn’t know what to do!! She has tried the chemicals but they dont work for long enough I mean that they get rid of lice but as soon as someone is lice free they get it again from someone else in the family because we are such a big family!! If someone gets lice the whole family gets lice its like a chain reaction!!! AND I’M SICK OF IT!!! Please does anyone have any ideas of a way my mum can easily and quickly get rid of everyone’s lice (in my family) and please give me advise that through experience REALLY works!! I dont want to end up being 21 and still having lice!! It is something disgusting that no one should have to go through for 10 years stright!!SO PLEASE HELP!!

Question posted courtesy of: Headlice Treatment