I need some help real bad, no matter what i do i cant seem to get anything more than 240 lid temp. I do a minion start and everything is fine for the first 30 min or so then BAM.....temp drop, i need to keep the vents all the way open just te maintain a temp. I go to stir the coals then i notice that some of the coal are still unlit at almost 6 hours through, what am i doing wrong??/