Agree with Zd542, Keep your CDs clean. Dust, finger prints and scratches degrade the sound quality.
CD cleaning question
I use a micro-fiber cloth to wipe my CDs down, but there always seems to be a few specs of dust left over. I was wondering if I could use the In the Groove record cleaner (a sticky roller that is intended for LPs) on CDs. It seems that it does not leave behind any residue, and might be just what I need to get those last specs of dust of the CDs. Any reason this would not be a good idea?