I cook a lot of barbecue and I have never seen this. I got up this morning after leaving the cooker going all night and the entire inside of the cooker -- although, perhaps fortunately, not the meat -- is coated with a fine white powder. I am using lump charcoal and I wonder if something untoward got in there. The powder looks like ash, but it is in a very fine, even layer all over the cooker including on the inside of the stack. That's what really freaks me out. If there had been a small explosion in the firebox (it is an offset cooker) I could see that blowing ashes all over the cooking chamber but UP THE STACK?
Anyway I can't tell if the meat is creosoted. I tasted a piece of the bark on my pork butt and it seemed a little bitter but it is hard to tell for sure without eating a whole portion. Any ideas?