Hey yall! Im brand new to this meat smoking thing and just joined the forum. I built myself a UDS smoker a few weeks ago and am having trouble keeping the temp up. It seems like the coals are starved for air. Im thinking that because when i take the lid off for a couple of minutes, the smoldering coals catch on fire and heat up again. But a couple minutes after putting the lid back on, they go out. Out of the 3 times i have used the smoker, only 1 product actually turned out. It was a 4 pound pork loin and it was AMAZING! On sunday I tried to smoke a brisket and the coals kept going out. I have 4 3/4 inch nipples along the bottom and 1 has a ball valve on it. My exhaust is a 3 inch hole in the lid. I'm not sure what im doing wrong cause ive read about other people's UDS burning all night long on 1 chimney starter of coals. Please help me so i don't get discouraged and quit the smoking game, the end product is just to good!