Running a CD lens cleaner as a preventative measure when there are no symptoms of drive problems is generally not advised since there is a non-zero possibility of the lens cleaner disc's brushes causing damage. However, I've used lens cleaners on several computers to revive balky or non-responsive drives; if the drive doesn't improve on first use of the lens cleaner, it's possible that the cleaner managed to scrub some grim off the LED lens but not enough to actually clear the lens entirely, and the interim state can actually makes things worse. If that's the case, try running the CD lens cleaner again for 3 to 5 passes. Lens cleaners typically come in kits with a separate device for cleaning CD discs themselves, with a bottle of solvent for the discs. In severe cases (e.g., kids eating PBJ sandwiches while trying to put a disc in the optical drive), it will help to spary some of the disc cleaning solvent on the CD lens cleaner disc before putting the cleaner disc into the optical drive.