Actually I have had the issue and I use a torch to start,, not sure what it is although I have blamed it on the wood had this issue with mesquite which I got on sale burns inefficient which leaves an un pleasant taste. Lots of black smoke, Switched to Apple which worked better, oak was also better, tried slowing it down to defcon 3 which helped also. Hope this helps, it is still one heck of a little grill!