Okay, I think I've figured out how to season my fluted stone, but I'd also like to season my Large round with handles. I've been using it quite a bit, but it looks awful. It isn't seasoning evenly, spotty and just dirty looking (not the good brown look). I understand for the stones with edges that you can use the crisco/salt method, but what about for the flat stones? And is there a way to remove all of the spotty dirty stuff and start over?