monobrow

Hi there, I have just discovered an old MD that was laying about that contains the master copy of my first 4 track jams. Trouble is, the internals of the disc is dirty and won't play properly. Can anyone point me in the direction of a disc cleaner? So far I've only found head cleaners out there, but sliding back the cover, it's quite easy to see that it's the disc thats dirty. Many thanks!! Mono