fuzzy old frames/foundation; best way to tackle cleaning?

I cleaned 10 deep frames (with wax-coated plastic foundations, and remnants of pollen in a # of cells) last fall. Dried them (enough, I thought) and stored them in a big plastic bin.

Opening the bin a week ago: fuzzy mold on the foundations and frames.

Today I gave 'em all a quick scrub with hot/soapy/vinegary water, and now they're in the sun to dry once more. Some pollen remnants remain in some cells.

So: is there a better way to do this so I won't have to bother with mold again? Even if I used new foundation, the wooden frames would still have traces of mold, wouldn't they? If so, the process'd probably start once more.

Any and all ideas're appreciated ....


Mitch