Interesting... well I'm going to go with this theory that it's the partially wet green wood. I'm also going to switch to wicked good hardwood once I run out of kingsford. I think wicked good is all that's readily available around these parts.
18.5" WSM (Model #2820)
Used Lang 48 or Meadow Creek TS60 or Klose being hunted for so if you know of any PM me