freeze them. according to a brit audio magazine. (fairly recent issue; last month maybe) you can freeze them in a household freezer for a week. then place them in your frig for a week. then put them in a cool place for 3 more days. (no i am not making this up) it is supposed to improve the sound by removing stress from the plastic. i have yet to do it. i am on an analog kick and listening to 500 new (thrift shop albums)....cleaning them is a chore. i also have most of the labels listed above...very good quality. even un-frozen. my modest analog set up kills any cd i own. good luck
