I have a question about getting the temp to rise? I got two racks of ribs in for about 1 hour now in a 30'' propane smoker, the temp was at 225 when I was getting er ready, since Ive put the ribs in the temp hasn't gotten over 200, seem to plateau at 180. Its my first time to ever attempt to smoke anything. I have three vents, one top, one each side. Do those need to be open or close? its 65 degrees outside right now, and no wind in my back yard. or do I just cook longer with the lower temp?