I recently read in Stereophile of someone cleaning the non-read side of a cd (and with a way overpriced cleaner I might add) and would like to know what purpose that serves? Is there a measurable difference or is there science behind it? Don't tell me it sounds better. It's supposed to sound better because that's what the manufacturer wants you to believe.
The logic behind its application is to remove the inital static build up during the CD creation process and subsequent playing in a CDP. There is a very apparent difference when I treat my older 10-20 year old CDs but less so with newer CDs.