I was extremely pleased with how well this cleaned my CD player lens. A CD was stopping and skipping and generally making a nuisance of itself. I used the cleaner. The CD now plays perfectly; I guess I can stop looking for a new bookshelf system. One tip: This thing is a little strange. It has 7 tracks. Track 1 does the cleaning. As it works, you can hear music playing. When it's done, you get a message that you can go on to tracks 2 through 7 for some speaker/wiring tests and some Maxell jingles.