Yes, you can apply as often as you need to. Just stay super gentle!

If you'reanything like me you will get very very dry. Ive been on the regimen for over 3 months and am still pretty dry though I've noticed it getting better over the past week which is exciting. Using the AHA mixed with moisturizer atnight once you hit your fourth week really helps. In fact, I believe that using AHA every night would eliminate my dry skin. The problem is that the AHA makes my skin bright red if I use it more than 3 days in a row. Just recently though I finally seem to be getting used to the AHA and haven't had as much redness. Also I highly recommend that you immediately start mixing jojoba into the moisturizer; it helps as well. The good news is that the regimen certainly works! I've been more or less acne free for about 10 weeks now! Good luck with the regimen!