Cleaning a Game Disc | Wii | Support | Nintendo
https://www.nintendo.co.uk/Support/Wii/Troubleshooting/Game-Discs/Cleaning-a-Game-Disc/Cleaning-a-Game-Disc-240314.html
WEBPlease use the information below for cleaning a dirty Game Disc. Fingerprints, smudges, and other foreign material can interfere with the game being properly read by the Wii console. Use a soft, slightly damp cotton cloth (use water only). Clean the disc from the centre towards the edges; do not use a circular motion. DO NOT use paper.
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