When you've issues with the glue between the layers having started to leach out it (apparently) also helps to just keep the disk in the drive and try to read from it for 1-2 days straight.
It failed to read two days ago but now appears to be just fine (even though it still reports broken sectors it at least plays again just fine now?!?)
My current best guess is that the heat and it spinning smoothed out the glue enough so that it is sufficiently readable now.