How long does it take for acne to go away if I follow this routine twice daily:wash face, apply salicylic acid 2%, wait 1 minute, apply moisturizer gel?

Hard to predict. Acne is often thought to be just a ritual of passage through the teen years.However,a percentage will continue to fight this problem well into their 30's or beyond. Persistence in spite of a good routine is part of life for some.