Filament Plunger
thingiverse
This is a simple device for cleaning your filament path and nozzle, and clearing blockages. You will need a length of stainless steel rod, 1.5 or 1.6mm (1/16") diameter, 100mm long. You should be able to find it easily on eBay. To use, simply retract the filament, push the rod down through the hole in the top of the extruder (while it's hot), push down until the filament stops flowing out of the nozzle, and then retract. Usually, any debris will stick to the rod, and can be removed easily. If anyone has a better name for this tool, please let me know!
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