>some nits were left behind
>your child is still being exposed to someone with lice
>the treatment you're using isn't effective
beside following the rules described in thbe previous question
No matter how long the problem lasts, be sure to remind your child that although having lice can certainly be very embarrassing, anyone can get them. It's important for kids to understand that they haven't done anything wrong and that having lice doesn't make them dirty. And reassure them that as frustrating as getting rid of the lice can be, there is light at the end of the tunnel.