I am currently using Differin at night. It's great. I use to use Reversa Corrective Night Cream (4% glycolic acid). My doctor told me to use my AHA during the day, but I have not because it does not contain sunscreen and the other AHAs containing sunscreens in the Reversa line have caused reactions. As well, I react to any AHA toners. So what do I do? Do I alternate my AHA cream and Differin each night? Or do I use my Differin for 6 months and then my AHA for 6 months? Or other suggestions?