“Seasoning skillet and grates before use I know I should season the cast iron skillet that comes with the range, but should I also season the cast iron grates before I use the stove top? FYI: I have propane gas. The stove I have now has porcelain coated grates and the residue from the propane leaves a dark coating that's very difficult to remove. I'm hoping to avoid that situation with the Samsung range. I'd appreciate any advice you can give me. Thanks.”