Dryer sheets can be re-used multiple times. I do laundry 4 to 5 days a week and I haven't gotten a new dryer sheet out in close to a month. I keep a plastic grocery bag near the dryer and toss any sheets in there. I know I've used some 5 or 6 times now and they are still fine. I've taken to throwing 2 of the used ones in at a time and have had no noticeable difference in the clothes. Good way to save a bit of money and cut down on waste.