I just bought a new slowcooker and when I take out the stoneware, the heating element is missing the little 'rubber feet' that provide a buffer between the stone and element. :
You Can Get Replacement Parts for Your Slow-Cooker
Easy Steps to Clean Crock Pot And Slow Cookers - Powerizer
Braised Pig's Feet (Best Pig Trotters Recipe)
Slow cooker pig feet recipe ( so tender!) - The Top Meal