This may be old news for some of you, but it just happened to me, for the first time, this week.
I opened up the CD jewel case of a Horenstein M3 that I bought several years ago.
I don't remember if I bought it new, or used, but 3 inch squares of foam had been put in the case over the CDs, I presume to keep them from rattling during shipping.
Well, the foam had deteriorated into thousands of sticky crumbs that were adhering to the label side of the CD. I brushed as much as I could off, but a lot of the gooey mess was still on the label. Yes, you guessed it--I did a dumb thing. I used a little CD cleaner spray to help get off the remaining goo. Yep, it wrecked the CD.
I spend an hour or two yesterday, going through all my CD cases and removing any foam inserts. Most were in very good condition, but a couple of others were starting to crumble. I think it would be wise to take chances about the CDs rattling, and get rid of foam inserts.
Has anyone else had this problem? I wouldn't blame you if you don't want to admit it.
--John H