Iíve read your comments on how to clean CDs. Here is a method which Iíve been using for several years with very good results. I use a car paste wax and cleaner. Not only does it do a good job of cleaning the surface, but the wax helps repair some of the small surface scratches. Iíve had several DVDs which were scratched so badly that they wouldnít play. Just after cleaning and polishing, they still wouldnít play. However, after allowing the wax to harden overnight, some played just fine. There's no guarantee that this method will repair your old scratched CDs and DVDs, but it's an indication that it is a good method for cleaning and protecting their playing surface. I donít have any idea which brand of wax works best, but the brand I use gives a hard shell finish.
Apply a small amount of wax with a cotton ball and a drop or two of water.
Smooth it around over the entire surface, being sure to clean off any finger prints or dirty spots and rub it into the scratches. Then give it time to dry. Remove the dried film with a soft clean cloth or paper napkin. The wax should help protect the CDís playing surface and make it easier to clean next time.