What I was wondering was what exactly was carbon based on the juices. If sugar is used, then there is a lot of carbon. I actually used a high powered magnifying glass here at work and put the atty under it. Yikes. You can really see the gunk on the inner coils, but not a lot on the outside coils. I mean, this stuff is caked on. I can see now how the burning method may work, akin to getting the grill really hot to cook off all the excess carbon (i.e. fat, grizzle, etc.) on it. But, those coils are really thin, I would think with time, that metal would break down, especially after numerous heat/cool cycles. Going to try the Coke cleaning method. When looking at it through a compound magnifying scope, you can reall see how thin the coil wire is. It's amazing to me that they work at all. Pretty delicate.