MrTwoStick, Sounds like your wood is dry enough. Big question is is your secondaries firing? Sounds like they should be firing if you can reach the stove temps you mentioned. One thing about these new type stoves if the wood isnt dry your secondaries wont light off in the top of the stove. The moisture in the wood cools the temps and makes it hard to get the secondaries to light off, plus you will have trouble reaching temps like 850 stove top temps. So your wood must be good enough. Then the creosote issue. If your keeping your secondaries burning by not closing the air down so far that the secondaries go out then your burning the smoke gases that cause creosote. You wont be building up too much creosote if your keeping the stove going with the air set low enough to still keep the secondaries going. How the front glass on the stove is it staying fairly clean? What is your stove top temp when you get the stove air shut down for the night? (Say 30 minutes after you get the air shut down for the all night burn what then is the stove top temp?) Can you see your secondaries firing up in the top of the stove. How long does it take to get the stove top temp up to 400 after reload?