i just built my first USD following norcoredneck plans. This morning i figured i would season it a maybe a cook a snap. Mainly i wanted to play with it and see how it maintanes a temp. Started this AM took 1hour to get to 220 degrees using kingsford charcol. I put on the 2 caps and left the valve open and check in a half an hour. my temp had dropped to 190. I have opened both caps again to bring temp back up. Do i need to install more vents on the bottom or just run with all the caps off?