Heat a wet cloth until it is steaming hot. This can be done by microwaving a wet cloth for approximately 45 seconds, or by dipping it in a pot of boiling water if you do not have a microwave.
Put on the oven mitt before handling the hot, wet cloth, and place the cloth over the cooked-on sugar stain. Allow the cloth to sit over the stain for at least five minutes, as this will help moisten and loosen the cooked-on sugar stain.
Remove the cloth and go to work gently scraping the cooked-on sugar stain with a razor blade. Keep the razor blade at a steady 45 degree angle to avoid chipping or scratching ceramic and glass stovetops. If you have a stainless steel stovetop, you may want to use a stainless steel cleaner and a plastic scrubber instead of a razor blade to avoid harming the surface and leaving scratches on the steel.
Remove excess cooked-on sugar after scraping with a plastic scrubber, which is like steel wool that is made of plastic instead to avoid leaving deep scratches or grooves. If there is still a significant amount of cooked-on sugar left on the stovetop, repeat Steps 1 and 2 to reheat and remoisten the cooked-on sugar, scrape as much as you can off the stovetop and repeat your attempt at scrubbing any additional sugar off the stovetop with a plastic scrubber.