Hotend burns and removes the part off the bed

[Frenazo]

Hello! I have my p1s for almost a year and everything was good until now. Sometimes at some moment of the printing, the nozzle looks like it stuck in the printing part, heat it and toast/burn it, and then with the movement of the extruder it pushs and detachs the part from the heated bed, ruining thewhole print. This happens randomly since a week it never happened before.

I checked the hotend and it looks fine but it has black stuff around and thetermistor can be separated from it. Anyway, I think the issue is in the hot end/termistor. Attached you can find some pictures of wrong parts. If you need anything else please let me know.

[Wsquared58]

Is that charred plastic or bits of the nozzle sock?

[Frenazo]

There isn’t any plastic in the nozzle but i realized yesterday that the nozzle sock is broken. I replace it and I’m running a test I’ll edit the topic with the result and if it is the solution or not I also ordered 2 new hotends.

Edit: finally, with the old hotend and the new silicone sock it is working fine. I will replace the hotend anyway. If you are having any issue related to the hot end, as a general advice take into de account the maintenance times of bambulab.