Allow the cooktop to cool completely.
Apply a dime- to quarter-size dollop of cream cleaner to the burnt-on stain.
Hold the razor blade tool at a 45-degree angle. Use the razor blade to scrape the burnt-on stain off of the cooktop, applying pressure as you go. Keep some cream cleaner between the blade and the cooktop at all times to prevent scratches.
Wipe the cream cleaner and residue off the razor blade with a paper towel.
Squirt some cream cleaner over random areas on the cooktop. Spread it onto the cooktop with a clean paper towel.
Buff the cream cleaner off the cooktop with a clean paper towel, rubbing in a circular motion.