Pouring water into a hot grill pan or fryer immediately after turning off the heat can potentially damage the non-stick coating. Non-stick coatings are typically made of materials such as Teflon or other types of polymers that can be sensitive to extreme temperature changes.
When a hot pan or fryer comes into contact with cold water, a sudden and drastic temperature change can cause thermal shock. This thermal shock can potentially lead to warping, cracking, or peeling of the non-stick coating.
To avoid damaging the non-stick coating, it is generally recommended to allow the pan or fryer to cool down naturally before adding water. Letting it cool gradually will help prevent rapid temperature changes and reduce the risk of damage.
If you need to clean a hot pan or fryer, it's best to let it cool for a few minutes, and then use warm, soapy water and a soft sponge or cloth to clean it. Avoid using abrasive scrubbers or harsh chemicals that can scratch or degrade the non-stick coating.