I posted a few weeks ago about head lice and we’re STILL plagued by it. I’m at the end of my tether - I did the Hedrin treatment on my son a week past Tuesday and did the 2nd treatment Tuesday night, a week later as it said. Today I’ve just found another live lice on his head - what am I doing wrong?!! Why can I not get rid of them?!! Can someone talk me through step by step what I should do as I’m obviously doing something wrong here and I just want to cry.