Thanks @mommaslp. I'm happy to help when I can.
I use the Glycolix 20% pads on the nights I'm off the Retin-A, which is every other night, as you suggested. Sometimes I skip a night with one or the other, depending on how my skin feels. I think for the most part, glycolic acid in higher strengths as this 20% should probably be reserved for nighttime use and be avoided using at the same time with other acids like vitamin C. It's just too much acid at one time. Also avoid using glycolic acid before, during and after dermarolling or microdermabrasion if applicable.