Anonymous posted an answer for this Kenmore 91112 / 91114 / 91117 Electric Kitchen Range:
"Use oven cleaner. Spray it and let it sit on a couple of hours. Scrape with a razor blade...."
Anonymous posted an answer for this Maytag MER5775Q Electric Kitchen Range:
"I had the same problem, but a plastic top burned on my range top causing a black spot. I..."