Need help my 3yr old got lice from a friend, all 4 of us got it. I treated it , me and 2 others haven’t had it since but my 3 yr old still has it bad no matter how many treatments I do and no matter how much I stay on top of it she still has it and a lot of it. I clean all her stuff very well, comb and treat her hair weekly. It is still there and still bad but she is the only one that has it. Why? I’m frustrated because I feel bad and don’t know what else to do