hi, does anybody have a effective solution to unclog the P1S nozzle, mine has filament inside properly stuck and I cannot pull it out, how can I clean it, I have tried different things like putting a very hot pin and when is cold pulling it out but still I have filament stuck inside, I do not know how to clean it and get it out, this is the second time that this has happened to me and I had to buy a new nozzle both time, I don’t want to have to buy a new nozzle any time that this happens, anyone has a solution for this, thanks
What type of filament 
ABS for example can be dealt with by soaking the hotend in Acetone.
With a little glass jar in an ultrasonic cleaner all plastic comes out with ease the next day.
PLA can be done with MEK (Methyl Ethyl Ketone or PVC primer).
Heptane works too on PLA but not as easy to come by.
If you have Nylon or PETG overcooked and stuck you probably need even harsher and more harmful chemicals…
PC can be a good alternative here and is relatively easy to obtain from chemical suppliers or suppliers for the industry.
No, not polycabonate…
I mean Propylene Carbonate - a clear solvent.
None of those chemicals are nice and I strongly recommend to use them only in well ventilated areas and with the proper PPE.
But I rescued totally overcooked hotends with them.
Take all sensors, heater and such off, just the bare metal.
Clean off heat compound and then soak over night in a suitable solvent.
Use a thin dental or piano wire (BLUNT not just cut end) to try to get through and push out some gunk.
Once you can the wire through the next soaking will be able to soften thing much quicker.
You CAN use the right filament as a plunger to try to push the goo out.
Hard, overcooked plastic will block the nozzle, so keep the wire at hand to free it.
An ultrasonic cleaner can often do wonders here once the worst is out.
With the solvent in a small GLASS jar it frees all baked on stuff the solvent alone struggles with.
Once I can see the light again I use a syringe pushed into the top to suck and push solvent through quickly and with good pressure - PPE IS essential for this!
Just a little cup or such with the nozzle deep inside the solvent and pumping back and forth…
Good luck and stop throwing away blocked hotends please
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thank you very much my friend, it’s PLA, I will give it a shot, thanks a lot for your help
If PLA and nothing else works there is one thing you can try before giving up - the oven…
PLA decomposes at high temps and only leave dry ashes behind.
Not nice but once blown out and flushed with a good amount of filament good as new.
If you soak with solvent try the filament in question first in the solvent.
PLA can take a while to soften and if you have a piece of filament in a closed jar for comparison you know when the stuff in the hotend is soft enough or starts to dissolve.
Putting a very hot pin inside has worked for me three times from three. First time when it happened I had a spare and I replaced the complete hotend…
Now my problem: I have three years experience with E3D Hemera and Bondtech BMG on two self made printers. Top direct drive extruders. Working perfectly today - but mostly not used because the P1S is more convenient. Never ever had a filament broken at the entry of the hotend? Some clogged nozzels of course…
With P1S I had 4 incidents in less then 300 printing hours!? Why this machine brakes the filament at the entry in hotend? I cannot find any explanation…