This is a first for me, but I'm guessing others may have had this, and have some way of dealing with it. I'm trying to sort out issues with one of my two E3D V6 hotends, and a possible problem with some nozzles - there may be a relationship here, and the problems may be feeding off each other. The nozzles appear to be rather fine, maybe causing hotend choking, and extruder clicking. The Hotend assembly is a Bowden setup. As part of trying to clear jams, and clean everything up, and generally just keep it all working, I have released the Bowden tube clips on the top of the heatsink to release the tube and pull it, and the jammed filament back out of the hotend. Now these Bowden tube clips have some wicked sharp teeth that grip the tube, and every time the tube is pulled out, even if you are really careful in making sure the teeth are retracted, some of the PTFE is shaved from the outside of the tube and left in the hotend/heatsink, ready to be pushed further into the nozzle once the tube and filament are re-inserted. Which on a fine nozzle contributes to jamming, leading to the whole cycle starting again. Does anyone have a technique or method for checking for, and removing this debris? Has anyone noticed a cold-pull working well here. I'm starting to think a routine cold-pull after a Bowden tube replacement/reinsertion might be worth doing as a matter of course. That, or some kind of sticky tool dropped into the heatsink when cool to fish any debris out. Something like a length of filament sprayed with 3M Spray-mount. Ignore the 3DBenchy, it was only there to prop the heatsink up at the right angle to get a look down.