Like the title says ... how do I clean the surface of the plates of stuck on material? I use mine regularly and it seems that more and more "stuff" is sticking to the bottom plate cover. I got most of the material off, but it is a chore most every time now. I have to tug at the discs to get em off. Walmart bags, Target bags, etc and small amounts of ldpe recyclable. I always pack those (shipping envelopes, bubble wrap or ldpe rolled foam) inside at a least a couple grocery store bags. Other than that, still working like a champ!