I have been using bulk filament for more than a year on a Cube3 I salvaged -- it came with two half-empty cartridges. It worked perfectly. Today, to "clean" the nozzle, I literally melted one of them. I have been using a fire torch to clean my espresso machine's porta filter for years, and I was too smart to think it will work with the aluminum? nozzle. I am wondering if anybody has a "hotend" or two from an empty cartridge that can sell to me? I am located at Canada.