Don't laugh, detergent and distilled water works great and letting them soak is a key to getting lose molds and other sticky things. If you are worried you can always run them through a VPI machine afterwards to clean any residual contaminates.
What do you do when nothing seems to get LP clean?
What do you do when nothing else seems to work? I have scrubbed with disc doctor brushes; used VPI fiber brush; tried multiple washings and nothing seems to get out this visible "gunk". Whatever it is, I've noticed it on a number of used LPs that I've tried to rescue. Its not raised, but just seems to have "attached" itself to the vinyl. Is it mold? I know its hard to know what exactly I'm dealing with without being able to see it, but what do you use as a last resort, when nothing else seems to do the trick?