The smooth surface of a ceramic cooktop looks much like a window, and you might create the intuitive supposition which you can clean it with glass cleaner, such as Windex. Aside from the fact that, generally, you probably need a stronger cleaner, Windex contains ammonia, which stove makers advise against using.
Ammonium Hydroxide — Not Recommended
Most stove makers sell a proprietary stovetop cleaner, and it’s not surprising that it is the product they recommend. If you don’t need to buy an extra cleaning merchandise, you may be tempted to try Windex — but don’t. It comprises ammonium hydroxidethat can be essentially ammonia dissolved in water. That’s a harsh cleaner which can etch the finish on the stovetop. Moreover, if you forget to wipe it dry and turn the stove, then the cleaner will tighten and release ammonia gas into the air you breathe.
A Safer Alternative
A better approach to clean streaks left by water deposits is to rub them away with vinegar. In case you have to remove hardened, then baked-on food, then coat it with baking soda, then spray with a solution of 1 cup water, then 3/4 cup white vinegar and a couple of drops of dish detergent. Combining this option with baking soda provides a cleaning foam, and you’re going to be able to wipe off the mess with a nonabrasive cloth in short order.