I have an older jotul 8 wood stove without the "Clean Burn" (CB) and have to clean the window almost daily. If i don't clean the window will be all black after a couple of days and you can't even see if there is a fire going or not. It's not that the wood i burn is unseasoned or wet; it is at least 1 year seasoned and below 15% moisture. Is this any better with the newer Jotul stoves with the CB thing? How often do you have to clean the window if youre jotul has the CB?