It's common to have these patches of stubborn dry, rough clogged pores on the back of your upper arms or your cheeks. Sometimes they have pimples, other times just hardened whiteheads or dead skin stuck to each tiny hair. They are frustrating and often don't respond to your smoothing attempts. What should you do? In my experience, these need a combo of 3 things to stay soft and clear. First, exfoliation. This is nothing new, you know it's important to remove extra dead skin.