I can provide some general information about potential causes for bubbling or blistering of the Teflon coating on a nonstick pan:
Overheating: Exposing a nonstick pan to excessively high heat can cause the Teflon coating to break down and bubble. The nonstick coating is designed to withstand specific temperature ranges, typically up to around 500°F (260°C). If the pan is subjected to temperatures beyond its recommended limit, it can result in bubbling or blistering.
Scratching or abrasive use: Scratches, dents, or using abrasive utensils and cleaning tools on the Teflon surface can compromise its integrity. The damaged areas may start to bubble or blister over time, as they are more susceptible to the heat and cooking process.
Low-quality or worn-out nonstick coating: Nonstick pans of lower quality or those with worn-out coatings may be more prone to bubbling or blistering. Cheaper or older pans may have coatings that are less durable and more susceptible to damage from heat, usage, or cleaning.
Improper cleaning and maintenance: Using harsh or abrasive cleaning agents, such as metal scouring pads or abrasive powders, can damage the Teflon coating. Also, placing a hot pan in cold water or subjecting it to rapid temperature changes can cause the coating to bubble or blister.
If you are experiencing bubbling or blistering on the Teflon coating of your nonstick pan, it is generally advisable to discontinue using the pan. Cooking with a damaged coating can potentially release harmful chemicals or particles into your food. It may be time to replace the pan with a new one to ensure safe and effective cooking.