When to replace a non-stick pan

1. Food sticks to a clean, oiled pan. The coating has lost its release. Nothing restores it — scrubbing harder makes it worse.
2. You can see bare metal. A scratch through to the aluminum or steel beneath means the coating's edges are now exposed and will keep lifting.
3. The surface is dull, chalky or discolored where it used to be glossy. On a ceramic coating this is the visible form of heat damage.
4. The pan is warped and rocks on a flat surface. It will never make even contact again, and on a glass cooktop it barely heats.
5. It has been heated empty until it smoked. A fluoropolymer coating degrades as pans pass roughly 500F, which an empty pan reaches in two or three minutes. One serious overheat is enough to retire a pan.

The universal advice is to avoid metal utensils, and it is good advice — but a scratch is a localized injury, while heat degrades the entire surface at once. Reporting on the laboratory work behind fluoropolymer breakdown has been around for two decades: coatings begin degrading above roughly 500F, which is the temperature of an empty pan preheating on a high burner, a pan left on a turned-off-but-still-hot electric element, or any pan used for a hard sear.

This is also the mechanism behind the bird-death accounts covered in why PTFE is dangerous for birds and pets — an overheated coated pan in an unventilated kitchen is a genuine hazard to a bird in a way it is not to a person. If you keep birds, the rule is simpler than replacing pans at the right time: do not own coated pans.

Ceramic coatings do not share PTFE's chemistry, but they do share the heat failure mode. Heat-cycling a ceramic pan past its published rating crazes and dulls the layer, and the loss of release is permanent. A pan rated to 450F used for searing is a pan being destroyed on purpose.

The honest answer is that it is mostly finished rather than dangerous. An intact fluoropolymer coating at normal cooking temperatures is not understood to transfer meaningfully into food, and flakes of PTFE that do come off are inert and pass through. The reason to retire a scratched pan is that it has stopped working, the damage spreads from the scratch, and the exposed metal beneath is now in direct contact with food — including acidic food, if the base is aluminum.

The regulatory concern with the chemistry is about the class rather than the pan in your hand: EPA documents PFAS persistence and health endpoints, and FDA has determined that a set of food contact notifications related to PFAS are no longer effective. That is a reason to prefer buying uncoated next time, not a reason to panic about last night's dinner. What is PFAS separates the three terms people usually mix up.

If you want the replacement to be the last one, buy uncoated: clad stainless for general cooking, or seasoned carbon steel if the pan being replaced was your egg pan. Both have no coating, so neither has a service life, and the trade is learning to preheat. If you want another coated pan, buy one with a published temperature rating and give it one job on medium heat — it will then last years rather than months.