Hey Susan. What I do to clean my pan is just pour in vinegar and water (about 25% vinegar/75 water) and let it sit for a few days (even a few hours does wonders).. seems to clean everything off.. if very stubborn I increase the vinegar content, and get it hot when you pour in (doesn't matter if it cools off over the day.. although you could actually boil it in the pan too.. that's supposed to be even more efficient at cleaning a pan).
Paul.