[cctalk] Floppy recovery

OK. I have just read in a bunch of Rainbow disks. Most of them read fine on the first, second or third try. Some have a sector or three amiss (I've not yet checked to see if those sectors are mapped to the filesystem or not). Some appear to be 'unformatted' though sometimes they read with errors. These disks have what appears to be some kind of grime/mold/??? on their surface. Is there a good way to read these diskettes? To clean the grime off and allow the floppy to spin (they all are super loud)... At the rate things are going, there will be 5-10 of these... Warner