I was trying to make pudding with lemon and berries this evening. I had the recipe and the ingredients ready. First in the directions bring milk, sugar, cornstarch to a boil. I did but they got burnt in my pan. I was very upset because it didn't work out good. Now my pan has the burnt residue of the mixture. What shall I do? It's stuck! I can't use my pan right now. I badly need a pan cleaner.