Finally had a nozzle clog after eight months of heavy printing. Fortunately a cleaning pick forced most of the filament out, but then I got to enjoy the particulars of holding an active heating element with an oven mitt to do a cold pull. 250°C to push in, then 90°C to pull it out, and had some burnt delicious stuff in there. Ran a ten hour print, and Eureka! She prints! #3dprinting #technology #3d