Fellow shavers, I have gotten a variety of responses and tales when asking this question. I usually rotate my razors so they get 72 hours between each use. The idea is to give them time to "rest." It was my understanding (and maybe I'm wrong) that this was the original reason behind 7 day sets. Rotate through a different razor each day until you get back to the first. Recently however, a fellow shaver suggested that barbers only used 7 day sets so they could sharpen them all at once and would frequently use the same razor repeatedly for weeks at a time. What do you guys think? Am I foolish to rest my razors through a 72 hour rotation?