I recently started using glycolic acid as my nightly moisturizer because Dan said that it would help reduce Flakes and also is hydrating. Dan said that it's supposed to sting a little which means it's working. The first few times it was burning a little kind of like a stinky burn so I knew it was working it wasn't burning my skin like chemical painful though. I put a pretty decent amount on and I don't feel any burning or tingling at all. Should I use more I mean I used pretty good amount though so I'm kind of confused? LOL thanks guys