Quote Originally Posted by 3dkarma View Post
Dust and debris can work their way into your hot end, so regular maintenance should include cleaning it out. Basically, you should heat up your hot end to above the normal extrusion temperature (e.g. 270 degrees celsius) then cool it to the glass transition temperature of your filament. For PLA, this is 60-65 degrees celsius; for ABS it's about 105 degrees.

Once your hot end reaches the glass transition temperature, slowly retract the filament until you've pulled it all the way out. The filament should form what looks like a straw at the end, where it's pulled everything out of your melt chamber / nozzle. If there's any debris it should be clearly visible.

Rinse and repeat a couple of times until you're happy.

For preventative maintenance, install a dust remover.
This is really what i am also wondering about , Nice share.Thank you.