crack it. Sliding rough cookware across it can cause scratches. A damaged surface may then be more vulnerable to further stress.
And once glass-ceramic develops a significant crack, continuing to cook on it can be dangerous.
The Cast-Iron Skillet Problem
Cast iron deserves special attention.
A cast-iron skillet is heavy, retains heat extremely well, and often has a rougher underside than cookware specifically designed for smooth cooktops.
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That doesn’t automatically mean you can never use cast iron on a glass cooktop. Many manufacturers provide specific
