Dear Slimscoop,
I once read about , and subsequently tried, an experiment involving margarine. In the summer time, put a small tub of margarine outside in your garage or somewhere where it can sit undisturbed. You will notice a couple of things. Even though it melts, it never goes rancid. It can not spoil! Also, no bugs will attempt to eat it, not even flies! If a fly wont eat it, should you? I also heard, but don't know if it is true or not, that many of the ingredients in margarine also are used as a base for plastics! I use light butter, and use half of what a recipe calls for if necessary. At least butter is natural!
Best wishes!
Natalie