If you have a gas fireplace, how do you clean the glass?
For that matter, once you remove the glass, how do you remove the soot / dust / dirt / grime from the flat black sheet metal box?

I don't want to hear about natural gas is a clean fuel and should not produce soot. Carbon fuels are made of that, thus produce soot and our fireplace has some in the worst place; in view.

Our gase fireplace is properly adjusted. My task is to clean it for listing, showing and sale at the end of this heating season