Appendix 1814 Blow carefully into the ball cage or use a can of compressed air to dislodgedust and lint.5 If the rollers inside the ball cage are dirty, clean the rollers with a cottonswab moistened lightly with isopropyl alcohol.6 Recenter the rollers in their channels if they are misaligned. Ensure thatfluff from the swab is not left on the rollers.7 Replace the ball and retainer ring, and turn the retainer ring clockwiseuntil it clicks into place.Cleaning an Optical MouseClean the outside casing of the mouse with a cloth moistened with a mildcleaning solution.Floppy DriveNOTICE: Do not attempt to clean drive heads with a swab. You might accidentallymisalign the heads which prevents the drive from operating.Clean your floppy drive using a commercially available cleaning kit. Thesekits contain pretreated floppies to remove contaminants that accumulateduring normal operation.CDs and DVDsNOTICE: Always use compressed air to clean the lens in the CD/DVD drive, andfollow the instructions that come with the compressed-air product. Never touch thelens in the drive.If you notice problems, such as skipping, with the playback quality of yourCDs or DVDs, try cleaning the discs.1 Hold the disc by its outer edge. You can also touch the inside edge of thecenter hole.NOTICE: To help prevent damage to the surface, do not wipe in a circular motionaround the disc.