Here's my muffin tins;
It's hard to see the two 6 bangers to the bottom of the above pic.
They're filled on the bot of this pic.
The 12 hole one is pressed heavy steel. They have never stuck in those.
The 6 hole pans are aluminum coated with teflon. Those never stuck either. Some say you can't use the teflon ones, the teflon puts off a toxic gas when they get that hot. Nobody died from using them, the wind must have carried it off.