If you have a glass-top stove, you already know how sleek and easy to clean it can be. But the smooth surface needs some extra care because it can crack or even shatter when exposed to sudden temperature changes or hard impacts. One of the easiest mistakes is placing a very hot pan, lid, or other heat-retaining object directly onto a cooler section of the cooktop. The problem comes from the combination of heat, weight, contact, and temperature difference, which can create thermal stress.

A hot saucepan lid is a common example. After cooking, it may seem harmless to flip the lid over and place it on the stove for a moment. However, concentrated heat in one small area can stress the glass. The same concern applies to Dutch ovens, baking dishes, kettles, roasting pans, griddles, and other very hot cookware. As the article explains, “The biggest issue is rapid temperature change.” Allow hot cookware to cool on a suitable heat-resistant surface instead.

Cast-iron cookware also deserves caution because it is heavy and retains heat for a long time. If your manufacturer allows cast iron, lift it instead of dragging or dropping it onto the glass. Scratches can also occur when cookware with rough or dirty bottoms is moved across the surface. Before cooking, check that the bottom of each pan is flat, clean, and free of rough debris.

Another habit to avoid is pouring cold water onto a very hot cooktop. Sudden temperature changes can create additional stress, while hot surfaces and water can also produce steam and splattering. Instead, turn off the burners and let the surface cool naturally before cleaning it according to the manufacturer’s instructions.

If you notice a crack, chip, spreading damage, or distortion, stop using the damaged cooktop and follow the manufacturer’s safety guidance. “Don’t assume a small crack is harmless.” The safest approach is to have significant damage inspected by a qualified professional. Simple habits—lifting cookware, avoiding extreme temperature changes, keeping pan bottoms clean, and treating the cooktop as a cooking surface rather than a countertop—can help prevent costly damage.