Phoenix CD/DVD Cleaner contains no alcohol or harsh detergents which may harm some CDR discs. Just spray and wipe. The cleaning agent, along with the dirt and oil caused by fingerprints, will be absorbed into the microfibers of the cloth. Kit includes Phoenix spray plus our microfiber 8 x 8 in. optical cleaning cloth. The 4 oz. size cleans over 250 CD/DVDs. The microfiber cloth is washable for a great value. Complete cleaning instructions included with each kit. Never clean optical discs in a circular motion. See the kit instructions for details.