I am trying to be more enviromentally conscious and waste less. I really hated the waste of dryer sheets and there always is a bunch laying around from the laundry. I googled reusing dryer sheets and a found a bunch of articles about how they work great for cleaning your tub of soap scum. I started saving them and today I finally put them to use. I was pleasantly surprised at how well they worked. You still need to scrub but I could see the scum coming off. I did find the sheets to be flimsy and I would need a bunch to do a really good job but they are effective and once I get my scum cleared, I think they will work brilliantly to keep the scum from building up.