For me, while sleeping, I toss and turn, rubbing my unit on a very cotton pillow case. Also, I shower every day, squeeze the water out of my piece, once it's on my head, I blow dry it on hot and high. Yeah, I'm not fragile with my units. Even with such abuse, the pieces hold up well. My last piece lasted 6 months before a noticeable bald spot was seen. Usually the bald spot is localized to just one area, and not the entire head. However, now with this Dermatch trick, I think I can reuse the old piece