Winter is back (for now), been burning my cold weather supply of Hammers. The heat is unbelievable!! Outside temp is 20 & falling, inside cabin is 78. I have noticed with this white hot flame, a almost chalk like residue inside the stove, when I do a cleaning. This is the hottest batch of pellets I've ever burned, and it doesn't seem to effect performance of stove. Any thoughts on this white chalk?? It almost covers entire inside of stove. The heat is awesome, and temps I get are record breaking. Well over 300 degrees on med. I've only experienced this with this super white hot heat. Just curious what the pellet pros think? Thanks to all.