Every time I treat DD 11 within weeks she's infested AGAIN. Its getting beyond a joke now I've spent nearly £40 on treatments. I've had her hair cut shorter. I've messaged the school who messaged all the parents. I can't afford to keep paying out - never mind the distress it causes her ( apparently kids at school are calling he the nit girl - the teachers have spoken to them ) BUT this cannot go on. Suggestions please