Hi, Richard here. I used to use the acne.org regimen along with AHA+. It used to make my skin so flaky every time i bumped up the amount of AHA+ , and was a clear indication it was working. I've stopped using the acne.org regimen recently, but kept using the AHA+. Now my skin doesn't react to the AHA+, and I've even applied it 3x in one day with full strength. No flaking, no reaction, no nothing. It is possible my skin got used to the glycolic acid? I am desperate to get rid of my hyper pigmentation.