New shelburne getting black on glass

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New Member
Nov 18, 2022
Upstate NY
Just had my new shelburne installed and have been using after about 5-6 break in fires. Still working out kinks, but almost every fire is producing black film on glass.

My wood that I’m using is all below 20% moisture and hardwood. Any thoughts to what it might be?
Is that moisture content measured on a piece that was acclimated in the home for 24 hrs, then resplit, and then measured on the freshly exposed surface (so you measure the inside of the split)?
When the fire is hot enough, the black will burn off. Cat stoves often run at cooler temps and have blackened glass from time to time. How hot have you run the stove?