Just like the title… I have gotten into the habit of spraying it with pam because I don’t buy those little muffin cups and I only make 6 muffins at a time so I end up have the edge 6 getting caked with pam… EVEN though I wipe it off before I bake. How can I get this off?

Hi. I am wanting to make muffins, but don’t know if I have a nonstick pan (I know how hard it is to get sprays like Pam off of them). Does anyone know how I can tell if they are non-stick/Teflon coated? They are darker in coloration (not from cooking) and have a slick, sort of "silky" texture to them. Any help will be greatly appreciated. Thanks! =)