Hello. I'm "trying" to smoke a rack of pork ribs in my brick oven. 2nd attempt and both times the ribs came out with a dark black coating. Under the black outer coating the meat actually tasted very good.... but I'm trying to determine why the outer coating turned black. I'm using a brown sugar based rub (based on the 12 Bones rub, brown sugar mixed with numerous spices and herbs). The oven temp is around 280 to 300 F. The smoke is provided by wet cherry wood that is placed in a charcoal chimney (with fired "cowboy charcoal"). The chimney is on one side of the oven and the ribs are on an elevated grill, other side of the oven with a pan of water under the grill. Ribs cooked for about 2.5 hours. I'm thinking the brown sugar is burning (where I think the intent is that it's supposed to caramelize). The ribs are not wrapped. Could I be putting too much rub on and it is blackening and not caramelizing? Looking for any thoughts, suggestions, etc. Thanks very much for the help. A couple of photos attached.