Per the manufacturer, The cleaning of the firebox will depend on the use of the insert.
Here are some recommendations for safety notifications and general information.
3.6 Removing Ashes Ash should be removed from the firebox every two to three days of full time heating. Ash should not accumulate excessively in the firebox since it will affect the proper operation of the appliance. The best time to remove ash is in the morning, after an overnight fire when the insert is relatively cold, but there is still a little chimney draft to draw the ash dust into the insert and prevent going out into the room. Ashes almost always contain live embers that can stay hot for days and which release carbon monoxide gas. Ashes should be placed in a tightly covered metal container. The container must be placed on a non-combustible floor or on the ground well away from all combustible materials. If the ashes are disposed of by burial in soil or otherwise locally dispersed, they should be kept in a closed metal container until they are completely cooled. No other waste should be placed in this container.
4.1 Wood Insert 4.1.1 Cleaning and Painting Painted and plated surfaces can be wiped down with a soft, damp cloth. If the paint is scratched or damaged, it is possible to repaint the insert with a heat-resistant paint see « Exploded diagram and parts list » in the Wood Insert Installation and Operation Manual. Do not clean or paint the insert when it is hot. Before painting, the surface should be sanded lightly with sandpaper and then wiped off to remove dust. Apply two thin layers of paint.
4.2 Glass Door 4.2.1 Cleaning Under normal conditions, the door glass should stay relatively clear. If the firewood is dry enough and the operating instructions in this guide are followed, a whitish, dusty deposit will form on the inner surface of the glass after a week or so of use. This is normal and can be easily removed when the heater is cold by wiping with a damp cloth or paper towel and then drying. When the insert runs at a low combustion rate, light brown stains may form, especially in the lower corners of the glass. This indicates that the fire has been smoky and some of the smoke has condensed on the glass. It also indicates incomplete combustion of the wood, which also means more smoke emissions and faster formation of creosote in the chimney. The deposits that form on the glass are the best indication of the fuel quality and success in properly using the insert. These stains can be cleaned with a special wood insert glass cleaner. Do not use abrasive products to clean the glass. The goal should be having a clear glass with no brown stains. If brown stains appear regularly on the glass, something about the fuel or the operating procedure needs to be changed. When brown streaks are coming from the edge of the glass, it is time to replace the gasket around the glass. Follow the instructions in section « 3.1.3 Gasket » in the Wood Insert Installation and Operation Manual. Always replace the gasket with a genuine one.
