Quite a few months ago I had a post on my facebook page about running out of Bakers Spray. Lots of smart and seasoned bakers chimed in, and almost half of them suggested this weird thing called GOOP.
Another option: A paper towel oiled w/ vegetable oil to grease a pan. Then sprinkle a little flour in it, until it’s lightly coated on top of the oil. I’ve been doing this all of my adult life for baking and it’s always worked. Just for baked goods. Other stuff I use a misto with either Olive or Canola oil.