Just wondering for those who exfoliate their skin. How do you do it? I could never do that with a toothbrush, it just feels wierd. And never is all my skin ready to come off at once. Usually the inner part of my lips will come off first, while the sides come off in another couple days. The peeling is never even. Is that the same case for other people? And if it is, do you exfoliate only the parts that are ready to come off?