Trying my first smoke today with one rack of baby backs and planing to put a cut up chicken in half way through the 2-2-1 method. I have the masterbuilt pro and I followed instructions for the foil and seasoned about a month ago. I fired it up to a steady 232. All of a sudden I see the temp on the iphone blowing past 300 deg and then by the time I got out there temp was off the chart 400+ (most the igrill can read) All my chunks were on fire. Had to take the pan out and dump them. Should I have changed the foil after seasoning? At this point, about 45 minutes in, only using a few chunks. Got the temp down but still working on getting it at a steady 230. Keeps going down around 210 then I get it going back up but shooting past 250. As I write this I think I have a steady 238. About the chunks. I did not wet them. I got them from Walmart, cheap like $5 for a 540 cu. in. bag. Now at a steady 230, dropped 8 in the last five minutes. Another peek and now at 233. Waiting a few minutes before sending this and still 233. I think I can relax now. Main question. Why my big fire?