All my new atomizers have beige something visible underneath the steel wool bridge, it appears to be a wrapping. Eventually the beige something becomes "charred and hard looking" as you noted, and I start seeing tiny black particles here and there inside the atomizer.
thanks for the info jamie.. i dont think this junk will get into the lungs but i am gonna accept the wrapping burn off or turn into crud factor as to why these thing turn into wimps after xxxx hours of use so predictably..
folks can keep playing the magic with spells and cleaning games.. me i am just gonna throw the silly things away and fit a new one..
trog