Yeah... I'm usually more cautious than this. I let my aluminum brewpot soak for an hour or two with hot water and Comet. You know Comet, it's that powdery cleaner that comes in the green canister. The one that says "Don't use on aluminum." Anyway, now I have these dark gray splotches on the inside surface of my brewpot. It doesn't look good. I guess I should have read the package beforehand. Should I use this as an excuse to buy a new brewpot?