I've been diving for 1 year now and after every dive my skin around my mouth starts to peel the next day. It's from the corner of my mouth down, the same area where the exhaust bubbles from my regulator hit my face. Is this normal? Can it be from bad air? I've been getting my tanks filled from 3 different shops but I'm still getting the peeling. It's like really bad chapped skin or a bad sun burn.