Discoloration on ceramic top

Hi- High temps make for tricky maintenance of glass or ceramic tops. The heat element must pass its heat energy through the glass or ceramic and into the pan. Water droplets will steam away, while a spatter of oil or even a few grains of sugar will melt and burn to a tough film of carbon on the surface. The obvious preventitive measures of checking pan bottoms thoroughly before contact with clean (yes- very clean) cooktop surface mean most spots may be small, they can be annoying to look at and tough to remove. My best cleaning results for these spots came from using a VERY small amount of OVEN cleaner (use gloves) on a paper towel placed on spot for a few minutes. A clean, new razor blade may be used to scrape off film. Hope this helps. - Thanks- ED