If a nonstick pan has been left unattended on high heat for 20 minutes, it's important to assess the condition of the pan before deciding whether to discard it or not. Nonstick pans are designed to withstand moderate to high heat, but prolonged exposure to excessive heat can cause damage and compromise their safety.
Here are some steps to follow:
Inspect the pan: Carefully examine the nonstick surface of the pan. If the nonstick coating appears intact, without any visible signs of damage like blistering, flaking, or peeling, it might still be safe to use.
Check for warping: High heat can cause the pan to warp, leading to an uneven cooking surface. Place the pan on a flat surface and check if it rocks or wobbles. If it is severely warped, it's best to discard it as it may not provide even heat distribution during cooking.
Consider the smell: If the pan has an unusual or strong chemical smell after being heated for an extended period, it could be a sign that the nonstick coating has been damaged, and it should not be used anymore.
Contact the manufacturer: If you are unsure about the pan's condition, it's a good idea to contact the manufacturer and ask for their advice on whether the pan is still safe to use.
Err on the side of caution: If there are any doubts about the pan's safety, it's better to err on the side of caution and dispose of it properly. Prolonged exposure to high heat can potentially release harmful fumes, so using a damaged nonstick pan may pose health risks.
In the future, it's important to be attentive while cooking and avoid leaving any cookware, especially nonstick pans, unattended on high heat for extended periods to prevent potential hazards.