Are there any recommendations for treatment or cleaning, de-scratching, etc, CD's when ripping one's entire collection for archival/media server purposes? Before I rip my hundreds of CD's, I'd like to be sure I'm getting the best possible transfer. I've always heard that if a disc isn't heavily soiled, the best way to clean it is by fogging it up w/your breath & wiping with a cotton cloth. What's the hi-fi world's consensus on this??? And what about any discs that may be a little dirtier or have scratches? What about these spinning disc cleaner/scratch removing contraptions that are widely sold?