Last night I pulled out a Chandos CD set that I had bought in the mid-'80s and was horrified to see that the foam sheet that was placed between facing CDs was rotting and adhering to the CDs. This residue seems to be unremovable, rendering the CDs unplayable. When I got home I checked other Chandos box sets and found the same problem developing. Strangely I looked at other brands similarly packaged and there didn't seem to be a problem. However I am now removing these sheets from ALL such sets.