The cleaning has been going pretty well - no real grease issues. "Barkeeper's Friend" has been very helpful and took off an amazing amount of aged dirt and surface rust on the corners. BUT. We got it Wednesday afternoon, and waited until just now (Friday aft) to plug 'er in - and it's making a fairly loud rattling sound now. Something it wasn't making when we tested it before, before purchase. The noise cycled off and then on again within minutes, rattling again (It was also making that desired percolating sound in the freezer too). I was alarmed at the rattling tho and unplugged it quickly. Any theories or suggestions as to how to proceed?