I was testing some media and put a disc aside after a burn. I rested it on a spindle on top of one of those blue foam rings so the surface would not be soiled pre-testing.
I picked the disc up and put it in the drive and the drive started to clunk and could not read the disc. You guessed it. The blue foam ring was not on the spindle but in the drive!
I could not shake it out of the drive either as it had firmly wedged itself onto the drive spindle where normally the disc would rest. I had to take it apart and gently prise it off the spindle and then put the drive back together (Fairly easy on an NEC).
Testing drive to see if it’s still working OK as I type :o