So I got the AMNPS maze and I have used it a few times. I'm using it tonight on my pork butt and I was under the impression that it is supposed to burn for over 6 hours. Even 8-10? I lit mine at 9 and it completely burned upmthr pellets in 3 hours. What am I doing wrong? I just filled it up again but am going to bed. At least I'll get another 3 hours but I should get longer. Any thoughts?