E3D-Online and1) Make Magazine havehas written about the potential damage printing carbon fiber and glow in the dark filaments can do to your printer's nozzle.
What I can't seem to find is what clues or warning signs to be on the look out for if your nozzle has taken a significant amount of wear. I've printed a few hundred grams of glow filament personally and have not noticed any change in print quality.
E3D says you may have "unpredictable erratic printing" with a worn nozzle. Can anyone explain or provide examples of what this actually means and when a replacement is necessary?
1) E3D link not valid nor can content be found