My new Breckwell stove makes cracking or popping noises during normal operation. It appears to happen when the flame increases and the stove expands. When the flame decreases and the stove retracts, it makes the noise again. I know this is normal when you first start the stove, but it does it off and on, 24/7. It appears to be coming out of the heat tubes, mainly the left side tubes as you are looking at the stove. It is annoying as h**l and I'm looking for a solution.