I agree with everything that Nancy said about the egg whites, but I just wanted to add, I have better luck with volume if my eggs are room temp. Sometimes to hurry them up, I'll put the dish of egg whites in the sink with a little warm water in it. I don't have copper dishes, but I use stainless steel. Just don't use plastic, as plastic can hold oil even through washings (i.e. butter, cooking oil etc.)