I run into St. Croix regularly with the tube scraper that will only pull out maybe a inch to maybe 1/2 way. I know it is from running the stoves dirty and getting creosote and build up in between the tubes. I have been running mine 12 yrs now and it is fine because I pay attention . Everything is welded together in the top. Anybody have any ideas to get these things actuating? The tubes are staggered and very close together so I have not found a way to get between them