Could Retin- A .025% Be Too Weak for Me to See Results?

I've been using cream retin- A .025% for one month without presenting irritation or noticeable benefits. My skin's usually quite dry so I always apply a good amount of moisturizer following retin-A. My skin feels dry after applying the pasty formula but this is immediately corrected with the moisturizer. I am wondering if the lack of irritation could mean that I am using too low a strength to receive any benefits from the treatment or if the moisturizer is interfering with the effects of retinA