These dryer balls are easy to use, saved me money and made my laundry feel soft and smell good. Prior to using the dryer balls the bed sheets would get twisted and still come out wet. Now I put the sheets in the dryer (with 2 or 4 dryer balls) and they come out dry, not twisted and they smell good. I use less detergent, no dryer sheets and saves me money. I have used the dryer balls 8 times and they still smell good and my clothes smell fresh each time.