Laser lens cleaners are needed to keep your equipment healthy. As dust and smoke float into your player or drive's inner compartment, the build-up can cloud the lens that the laser is focused through. A dirty lens distorts data and prevents the laser from "seeing" clearly. This is yet another cause of dreadful "skipping", "freezing" and "crashing" because the laser cannot focus properly. It's so easy to use, just pop it in and press play! Compatible with most optical 5 1/2" disc drives; CD, DVD, Game Disc, CD-ROM, CD-R, etc.