I purchased this hearth heater last fall. I really enjoyed it throughout the winter. It's getting time to burn again and I need to clean the stove pipe from the roof down. I used to do this with the fireplace. I know it involves removing the shelf above the secondary burn tubes, as well as the tubes themselves. Does anyone know if there's a video of this online? I was going to get the guy that installed it to clean it the first time, so I could watch him do it. My plans changed because of the Covid. I don't want anyone in my house, at this time.