I am trying JJ's direct ribs for my third cook and am having quite a difficult time keeping the temp to 220. I have shut everything down and it still wants to creep up to about 280. It's pretty windy outside, too. I know I can't keep it shut down too long, and I am just 45 minutes into the 3.5 hour cook. Any suggestions? And if I can't get the temp to stabilize at 220, how long should I cook them at 270/280. Thanks!