PSA for those using non-stick bake ware . . . .
every spray product mentioned that I've tracked . . . has lecithin as an ingredient.
it is an 'emulsifier' - used to ensure all the other spray ingredients 'behave as one'
if you have encountered a brownish unremovable coating - turning your non-stick into to stickware, , , ,
it's likely the lecithin component. not even pure Teflon 'sheds' lecithin.
fwiw