By Deanna Pai, Glamour Photo: Delphine Achard/WWD It's like clockwork: You spy--or, almost as bad, feel--the beginnings of a zit. The next thing you know, you're applying layer after layer of your go-to spot treatment and scrubbing it to death. But is that really doing the trick, or could you actually be making it worse? You probably know where this is going.