I made pizzas last night and had a hell of a time getting the egg hot. It only made it up to about 600 and didn't stay there long. i barely had enough hot coals to finish up the fourh pie(at only 400 degrees!). The outdoor temperature was in the high 20's and I was using Frontier charcoal, which I suggest you don't waste money on. I was just shocked by the low temp and the brief burn time. Any tips or theories would be appreciated.