Use a soft, dry cloth to carefully wipe the disc from the center outward as follows.
WARNING: There is a risk of data loss. Do not use solvents such as benzine, thinner, commercially available disc or lens cleaners, or anti-static spray intended for vinyl record LPs. Using liquid cleaners can damage the disc contents.
NOTE: Dust, fingerprints or scratches may cause the disc to malfunction. Always handle the disc by its edge and do not touch the surface. Also, store the disc in its case when not in use.