I recently moved back to the USA from Japan and shipped my Bearbricks. Thinking it would be fine, I stuffed them altogether in a wrapper made of bubble wrap. Most turned out okay, but a handful seemed to have rubbed off on each other, leaving streaks and dots on a few Basics, etc.
Any recommendations for cleaning them up without hurting them anymore? A soft cloth alone doesn't do the trick. Next step is warm water and soap, but if that doesn't work...?