As a disclaimer (so we don't get 50 posts telling me not to use soap) I know... you can not use soap on PC stoneware. I also know that they season over time. So my problem is I ordered a stone loaf pan on ebay and it looks like it hasn't been used as the description says. However it did some with some oily stain on it. And I am concerned about what it came from and if that may give my food a bad taste. I tried scrubbing with hot water and that didn't do anything. I saw on another post about a cleaning scrub for PC stoneware. A paste make from baking soda and salt. It worked really well. Almost removed it all. I'm still worried about a bad taste in my food though. Does anyone have any suggestions for an experiment? I would prefer something that is not tedious, or expensive in case of a failure. I guess it should also be kind of bland, and not extremely flavorful. Ideas anyone?