I have a 13 year old daughter that has hair above her lip (mustache). Any suggestions?

She is white, my side, black dads side. Since she's been 11 we have noticed it becoming more darker. We tried electrolysis first, 6 sessions no difference. I then switched to laser, after 6-7 treatments and having her shave and apply a meladine spray for 2 weeks, still very noticeable. Better but, still there.i don't know what else to do! I feel so bad for her. Being 13 with this is very difficult for her. Please help!