I seasoned a new CI skillet in the oven tonight. I basically washed it, put on a light coat of crisco and baked @ 450 for 1 hour and let cool. At this point the pan looked really good, but I wanted another coat on it to be sure. Did the exact same thing as the first time but now my pan came out all spotty, kind of looks like a leopard pattern of light and dark spots. Any idea of what happened and if I need to do anything else to it???