I ended up with a nozzle completely covered in resin much like this:
https://wiki.creality.com/en/k1-flagship-series/k1-series-general-documents/nozzle-leakage-treatment-guide
What causes this and how do I avoid it occurring again, cost me about $100 to repair?
How does the K1C do that with the unicorn nozzle? What is the K1C MAX, I wasn’t aware such a model existed?
YOU NEED TO CHECK YOUR NOZZLE AND COOLING BLOCK ADAPTOR THEY GET LOOSE SO ITS GOOD TO CHECK WEEKLY AND DO IT AT OPERATING TEMPS
As @John_Will said it makes a difference in what model printer you have. If it’s an older style K1 or K1 Max then the hot end is different from the newer ones.
If you do have the older style then your have to make sure the nozzle is installed correctly. It involves heating the nozzle first and two wrenches to take the nozzle out. If it’s not done correctly than the filament could leak out from pressure where the nozzle meets the hot end. The newer unicorn nozzles solve that problem by being just one piece instead of two eliminating the possibility of a leak between the two parts..
I have a 2024 K1 Max which comes with the unicorn hotend.
@John_Will my apologies it’s the K1 Max I have.
Now I’m wondering how that Unicorn nozzle would leak like that… 
I also wonder how the unicorn nozzle could do that unless it’s damaged. That sure seems to be leakage in the middle of hotend, I don’t see how that can happen unless the nozzle is damaged.
Hi all,
Im a bit late to the discussion but after this occured to me i did some reading, but nothing explains why this happends.
I think the nozzle did not leak, as the unicorn nozzle is one whole assembly. If it would have leaked, there’d be signs that the unicorn nozzle itself is caked on the screw threads. In my case this was not the problem.
I noticed that my print did not stick to the build plate. It then kept printing, and the hot plastic sticks to the nozzle. The outside of the growing blob cools and hardens, then the inner core stays molten. When then new filament keeps feeding, it finds it’s way around the hot parts of the hotend (under the silicone case), since that is the only place for the molten plastic to go.
Maybe a wild guess, but Id love to hear other’s thoughts
