Normal
I had a good candidate to try this last night. Cut the cake and proceeded to toothbrush with baby shampoo. Inside. Outside. Anywhere the bristles could reach and a bristle pipe cleaner down the airway. Not against the Murphy's. I have baby shampoo for washing wools (read about it elsewhere). A very mild and safer soap. Definitely dulled the surface, but I expected that. No removal of stain/color. It's now in an alcohol/cotton ball soak. Will report back after the first smoke in a couple days.