About 3 times a season I take the back off my Seton and clean the back tubes that I ca View attachment 93487 nt reach from the front of the boiler. This was a nasty 4 hour job the first time I did it. I've been trying to improve on the cleaning time since then. Last night I set a personal best time of 45 minutes from the time I cracked the first nut until ready to burn again. Here's what's changed: 1) no creosote - storage, no cycling, and 2-3 year dried wood have eliminated creosote. So there's no tube scraping needed, just dusting. 2) good bristle brush. Grainger sells a 27" long twisted wire brush thats 2"diam and has a 6" long section of bristles. (Tough Guy 3EDP6). This worked well on the back and its even better for cleaning the overhead tubes from the front. The long, fairly strong handle can be bent to reach most of the way down the vertical section of tubes. 3) I use aluminum foil tape to seal the holes around the water return instead of silicone. I took a picture of the tubes and brush after dusting.