My wife and I were having a snack at a Starbucks yesterday and I had ordered two of their hot breakfast sandwiches as I had missed my lunch. My wife asked for a taste of the egg, cheese and bacon sandwich, so I cut out a wedge with my Viele II knife. I wiped it as best I could with a paper napkin, but I could not get all of the cheese off. When I got home, I tried light machine oil and it didn't work and then tried a Marine Tuf-Cloth. It removed some of the gunk, but not all of it. Does anyone have any suggestions for removing the rest of the stains?