Before you attempt to copy a scratched disc, make sure the surface of the disc is not dusty. Clean the disc with a soft and clean cloth, or a tissue, even if disc appears clean at first glance. Try cleaning the disk, from centre to the edges, with gentle hands.
You can also buy a special cleaning fluid. You can find it in a store which sells computer and multimedia equipment. Choose a cleaning liquid made by the well-known manufacturers. This cleaning liquid can remove all the scratches if applied according to the manufacturers' instructions.
Wash the disc with warm water and soap. Then wipe it dry with a lint-free cloth, very softly. Make sure that the surface of the disk is free from small particles that can scratch it further.
The use of toothpaste is the best and most effective method of cleaning a scratched disc at home. Gently apply tooth paste on the surface of the disc and rub it. Rinse the disc under hot tap water once you feel that the paste is drying up.