I had been a firm believer in using cotton cleaning cloths but decided to try these microfiber cloths. I was shocked to find how much better these are than the cotton ones I had been using. Huge improvement when used to clean glass (wine glasses, eye glasses, mirrors, etc.). I would not use anything else in the future. Just remember to wash these by themselves and not with regular laundry and do not use fabric softener. I highly recommend these.