Oh my, hate it when this happens. I wish I could go back in time and taqke back what I said. YOu aren't alone. But on the other hand, if you truely never cleaned it or oiled it, etc....then you are so lucky it lasted this long. Hope you figure it out. Might take some extra time and cleaning. FOr those hard to get spots I use a can or spray. SOme say don't use it, I always have. Keep us posted if you can save it.