"Most of the time, when a CD suddenly refuses to play, it means that dirt, fingerprints or scratches on the CD are interfering with the drive's ability to read the disk. Wiping the read side of the disk from the center outwards with a mild soap and water solution, or a cleaning solution made for CDs, and a lint-free cloth will usually clean off dirt and fingerprints. The operative words here are "wipe", as in gently, and "from the center outwards". Don't scrub and don't work in circles; work from the center all the way out to the edge."
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