Sony PCG-GR300K VAIO User Manual page 26

Notes on CD and DVD discs
 Do not drop or bend the disc.
 Do not touch the surface of the disc. Fingerprints and dust on the surface of a disc may cause reading errors. Proper
care of the disc is essential to maintain its reliability. Do not use solvents such as benzine, thinner, commercially
available cleaners or anti-static spray, as they may cause damage to the disc.
For normal cleaning, hold the disc by its edge and use a soft cloth to wipe the surface from the center out.

 If the disc is badly soiled, moisten a soft cloth with water, wring it out well, and use it to wipe the surface of the disc
from the center out. Wipe off any remaining moisture with a dry, soft cloth.
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