An interesting effect of exposing a carbon-based material to levels of heat far beyond it's melting/glass transition point (as with a blowtorch): it usually will carbonize, essentially vaporizing everything but the carbon. The resulting form is generally brittle, and can easily be broken apart and dug out, if it didn't fall out on its own. This is a reliable method for cleaning 3D printer nozzles, given one has the tools to pull it off (most commonly the cleaning cycle of an oven).
Filastruder 2607 w/ Filawinder @1.75mm.
Dual-extruder MaxMicron Prusa Mendel: RAMPS 1.4 w/ Repetier Firmware+Full Graphic LCD Controller, stock hotends, 3Dator extruders w/ MK8 gears, insulated enclosure w/ 2 heat lamps, RPi 2B w/ Repetier Server.
0.1-0.2mm layer height, heated bed w/ PEI surface, inductive-sensor autolevel, 0.5mm to 0.2mm nozzle diameters.