The scientific method rolls!
Zzzz: Oh, I welcome you colleague! I managed to do so in puberty. just tried different combinations of all kinds of means and behavioral habits, and recorded the frequency of appearance of acne as a result. It turned out that the most effective - no chemistry, it was enough to wash twice a day with very hot water, and then thoroughly wipe the face with a towel (before this did not wipe out - I thought what sense, but when the skin is wet and fresh). I now understand that hot water expanded the pores, and the towel absorbed excess fat, without overdrying, and peeled off the peeled particles of the skin. Thank you for the science!
zzz: ps: no remedy from the store / pharmacy worked.