Dear Doctors, For 8 mos, I’ve slowly increased Retin-A to 3x/week on my face and neck with great results. Mineral sunscreen is my only option because I’m allergic to chemical SPF. Mineral sunscreen takes great effort to remove at night before applying Retin-A. In the morning, is it necessary to wash the face before applying sunscreen to head out for a run? Even good tap water in NYC has endocrine disrupters, much chlorine and I’d like to skip this step in the morning. Your advice, please?