I thought that eSun cleaning filament worked but I couldn't load PLA filament into the extruders. I replaced one of the nozzles with a new one and removed another nozzle from a second extruder. I thought that I finally 3D-printed a part for a model of a manual transmission but the part failed about 2/3 of the way up. The company that makes Flashforge printers has spare parts that I need.