I used to have one of those "CD cleaner" discs years 'n' years ago when i got my first CD player, cuz it seemed like the thing to do at the time. I used to use it once in a blue moon till I realized that I never really noticed any difference in sound quality before or after a 'cleaning' so I decided that it was B.S. and sh*tcanned it.
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"If you're a false, don't entry, because you'll be burned and died!"