Is my pan ruined? I coated it evenly with vegetable oil, put it on low to medium heat, came back after about 20 and the centre where the now circle is was dry and the oil was around the dry circle. I cleaned it under hot water, gently scrubbed, the hard crumby circle away and it went down to what you see now. I reseasoned it and put it in the oven upside down but nothing changed. Help!