Review (5/5): Great little gadget to keep your feet smooth
I love the Emjoi pedi foot buffer. It works well if you use it every few days. If the rollers look worn out after a use or two, they aren't - just rinse them off and the color is back. What you were seeing was dead skin. I highly recommend this product; a good deal for the price. I use it every other day and my feet are always smooth.