bikerbw, I have two cleaning CDs: one with tiny rubber brushes and another with holes that create air turbulence. The first one works better, but the second is gentler, being contactless. Few people reported success with tiny amount of mineral (sewing machine) oil on laser guide rails.
I had once Cambridge CDP with Philips mechanism. It had magnetic clamp holding CD down. Felt on this clamp wore out leaving gap and CDs wobbled a little. Since you will open it to clean with isopropyl alcohol you can inspect things like that as well.
I had once Cambridge CDP with Philips mechanism. It had magnetic clamp holding CD down. Felt on this clamp wore out leaving gap and CDs wobbled a little. Since you will open it to clean with isopropyl alcohol you can inspect things like that as well.