The glass cooktop habits that cause the most damage are sliding pans across the surface, using rough-bottomed or warped cookware, letting sugary spills cool, and using the cooktop as extra counter space. Prevention starts with lifting pans instead of dragging them and cooking only with flat, smooth-bottomed cookware.
Mistakes at a glance
| Habit | What it leads to | Do this instead |
|---|---|---|
| Sliding pans across the glass | Scratches, especially with grit under the pan | Lift pans to move them |
| Using cookware with a rough bottom, such as some cast iron | Burrs and rough spots that scratch the glass | Check pan bottoms for rough spots; GE advises against cast iron |
| Cooking with glass, ceramic or stoneware pans | Scratches and, for stoneware, poor cooking | Use smooth metal cookware |
| Using warped or rounded pans | Uneven contact that may crack the glass | Use pans with flat bottoms |
| Leaving a sugary spill to cool | Pitting and permanent marks | Clean sugary spills as soon as it's safe to do so |
| Using the cooktop as a cutting board or counter | Scratches, and cracks if something heavy drops | Keep chopping and storage elsewhere |
| Letting plastic or foil touch the surface | Melted material bonded to the glass | Keep plastic and foil off the cooktop |
The ones that matter most
Sliding pans and rough bottoms
Glass-ceramic is hard but not scratch-proof. Whirlpool's ceramic glass care guide says not to slide cookware or bakeware across the cooktop, to avoid scratches. Dragging a heavy pot is the worst version of the habit, because whatever is under it gets pulled across the glass. GE's cookware guidance for radiant glass cooktops doesn't recommend cast iron, and warns that a pan with a burr or rough spot will scratch the glass surface. Some brands allow cast iron used with care, so check your manual, and run a hand over the bottom of any pan before it goes on the glass.
Warped pans and the wrong materials
A pan that rocks on the glass touches it in only a few spots. GE's cookware guidance says the bottom of the pan needs to touch the glass and that pans that aren't flat may crack it. It also says glass or ceramic cookware isn't recommended because it may scratch the surface, and stoneware may scratch it and cook poorly. Set a pan on the cooktop and try to rock it. If it wobbles, retire it from glass-top use.
Letting sugar spills cool
Sugar does more than stain. Whirlpool's care guide says to clean up spills of foods containing sugar as soon as possible, because once they cool they can adhere to the cooktop and cause pitting and permanent marks. Use care around a hot surface, and follow your manual's method for hot spills.
Using the cooktop as counter space
A flat glass top looks like spare counter. Whirlpool says not to use the cooktop as a cutting board, to avoid storing jars or cans above it, and that dropping a heavy or hard object onto it could crack it. It also says not to let objects that could melt, such as plastic or aluminum foil, touch the cooktop. Burner and drip-pan habits on coil and gas tops are covered in stovetop habits that damage burners and drip pans.
Signs it's already caused a problem
- Fine scratches or a hazy patch where pans usually sit
- Small pits or rough spots that don't clean off
- Marks that look like rings around one burner zone
- A chip or crack, even a small one at the edge
- A burner zone that heats unevenly where the pan used to sit flat
Stop using a cooktop with a crack and have it checked by booking a cooktop repair visit.
Sources
- GE Appliances: Electric Range, Cookware Used on a Radiant Smooth Glass Cooktop
- Whirlpool: Maintenance of Ceramic Glass
Habit to keep: Treat the glass as a cooking surface only, never as counter space or a cutting board.
If your cooktop is chipped, cracked or heating unevenly, call ProFix San Antonio at (210) 761-6006.