Why? Dirty CDs can cause read errors or cause CDs to not work at all.
Procedure: Cleaning
CDs and DVDs should be done with a cleaning kit but can also be done
with a normal clean cotton cloth or shirt. When doing this with a clean
cotton cloth or shirt, wipe against the tracks, starting from the middle
of the CD or DVD and wiping towards the outer side as shown in the
below picture. Never wipe with the tracks; doing so may put more
scratches on the disc.
It
is recommended when cleaning a CD that water is used. However, if the
substance on a CD cannot be removed using water, pure alcohol can also
be used.
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