Dust, dirt and other contaminants collect in your drives. Dirty drives result in malfunction, missing data, error messages and lost productivity. Proper cleaning is the easiest, least expensive way to protect your data and prolong the life of your computer products. Any other questions? The Belkin 3.5 Diskette/CD/DVD Cleaning Kit cleans your valuable data and disk drives with non-abrasive, safe solutions. Ideal for all PC system based computers, this dual function kit includes easy-to-follow instructions.