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I recently found a tub of old pieces that I had not seen in years. However, many of them have small brown dots on them that should not be there. It seems to be some kind of mold, and I was wondering if anybody else has experienced this, and how to get rid of it. I tried rinsing it off, and in many cases it was in crevices that could not be reached with my fingers. Also, I would like to know if there is a way to clean an entire tub of them without inspecting and taking out each individual piece. Any advice would be very much appreciated.