Hello, we've been burning in our wood stove since about October. Over the weekend, we heard some crackling in the stovepipe (up near the ceiling) and decided it was time to clean the chimney. We did that, but our stove has baffle boards on top, so after sweeping everything down we kind of tilted the boards as best we could to try to spill the soot down into the firebox. That was yesterday. Today, we're hearing the crackling again, although it goes away when we close the door. Did we not do a thorough enough job? Or is there something else going on? Should we be alarmed?