Dd, 13, has the most awful blackheads on her cheeks, big, swollen and very noticeable. Unfortunately, she has recently been on acne treatment prescribed by the doctor, who told her to use nothing on her skin other than plain water. The mean child seems to think his medical training trumps my 30 odd years of spot blitzing, so won't let me near them. Is there anything amazing you have come across that I can persuade her to try??