The Piazzetta Monia 2.0 Maintenance Manual lists "cleaning the combustion chamber" as weekly maintenance that should performed by the owner. It involves removing the cast iron back panel to expose the combustion chamber. This seems excessive. I did it for the first time today after running my new stove all day every day for 2-1/2 weeks, and there wasn't a lot of soot or ashes in there, didn't seem necessary that it be cleaned. Certainly not urgent. How important is it that the combustion chamber be cleaned every 7 days?