Hello. Well after the fourth cook I'm having issues with controlling my temps to stay at 250. The first cook was chicken and I just wrapped the water bowl in foil and let her go wild. Second cook were some baby back ribs and this time I went out and got the 14 inch terra cotta saucer, but still couldn't hold the temps down. Third cook were some spare ribs and again it was running too hot. Friday night I decided to cook a 10 lb. Pork shoulder and again I was only able to keep the temps to about 270 with all bottom vents closed. Top vent completely open. All 4 cooks when done all vents were completely closed (including the top vent) to extinguish the fire only to find nothing but ashes left. I always fill my ring to the rim with k blue bag, use the minion method with about 12 lit coals to get it going. My questions to the more experienced, do I need to give it more time for the wsm to seal and sit correctly? Do I need to add water to the pan? Do I need a new unit? I have a wsm 18.5 and I'm using a taylor digital thermometer at the top grate level to monitor my temps. Any suggestions, or am I just being impatient? Thanks...