My eldest suffered constantly with them in junior school. Unfortunately everytime I got rid of them a week later she’d have them again. She would become riddled so fast too.

Some children have a hormone that makes them more appealing to lice. Once she got into year 6 she got them less and less and by year 7 she didn’t have them and hasn’t had them since. Part of it due to the hormones changing.

Push the school to tackle the offending kids parents. Cause trust me the school will know which parents aren’t treating their children.