How to clean CDs

I was trying to clean a CD with my old Discwasher manual cleaner, and the thing came apart while I was using it, which left a glue-like deposit on the CD. I would imagine the deposit would come off with some kind of mild solvent, but I have an idea (from where I don't know) that solvents kill CDs. However, soap and water didn't do the job, and this is an out of print CD that seems relatively unavailable at the moment (otherwise I wouldn't care). Anybody got any great ideas how to clean this?