My 11 year old daughter has developed many blackheads and some spots on her T zone recently and I’ve read that salicylic acid is a good treatment for them. I’ve found a 2% liquid exfoliator by Revolution and also a cleanser by Inkey List that look good but I have never used anything like this for spots. Any advice please? Would salicylic acid be too harsh for such young skin? I’ve looked in the preteen section and can’t find anything particularly useful. Also at recommendations for products for her would be great, thanks.