Hi, My guess is that most pellet stoves have heat exchanger tubes, scraper, and scraper rod. So this is proably not a question specific to my Ecoteck Francesca. In late March, my scraper froze in the closed (in) position. I tried emery paper, a small putty knife, kabob skewer, a bottle brush, etc., on the tubes. The areas that I could touch with my fingers were smooth and shiny. But somewhere up there at the back, no matter how I bent the emery paper, there was (and still is) a bump of something that blocks the scraper movement. I pulled the scaper rod hard, with the stove both hot and cold. But I only rocked the stove and risked bending the exchanger box. I now clean the exchanger tubes daily. On the weekends, I do a more thorough clean, hoping to budge the scaper. The scraper doesn't budge. So now. 1. Is there a way I can disassemble the the heat exchanger box from the back (on an Ecoteck)? 2. Any advice on a home-made tool, to hook over the exchanger tubes for scraping the tube tops? Any improvements on a bent stiff coat-hanger, with the enamel burnt off? Any suggestions gratefully received. Thanks.