I don't use any sugar in my rub, so that's not it. SPOG and usually a little something extra. This time it was a little Chipotle powder. I used to foil wrap when it got the color I liked because I was not a fan of "meteor" looking briskets. So, the color was better, but the bark was mushy. After I got this cabinet, I tried natural all the way through and decided I do like the bark that comes with the meteor. Now to perfect it, I may have to give that roll of Kraft paper I bought a couple years ago a try...