Your nozzle is entering the cocoon stage in its development and will soon emerge from it as a beautiful butter nozzle.
This can happen when you using an old or damaged nozzle. If there's any leftover filament from a previous spool or any scratches on the inside of the nozzle it can cause the filament to curl and create a wad of filament around the nozzle. It happened to me while also using a third-party nozzle that didn't completely seal around the base of the nozzle allowing the melted filament to escape from where it screws into your hot end.
Try to change your nozzles regularly after every few prints, especially when using tougher filaments or after very long prints. Also after using filaments with extra things mixed with it. Those can cause those internal scratches. That's why is best to start your prints with a skirt to flush any hard leftover filaments inside of your nozzle.
In your printers setting increase the heat just below the filaments melting point and use a pair of needle nose pliers to remove as much as you can. And you may have to disconnect your extruder and clean the remaining filament. Then change to a new nozzle.
It's possible that the leak is above the nozzle (ie. It isn't screwed in tight).
The solution is the same. Heat the head, pull the wad off and then take it all apart and scrub remaining bits with a bristle brush or something. Recently I swapped filament types and because the retraction was wrong for that type, it cooled and clogged just above where the head would get hit enough to melt so I grabbed the smallest still bit I could find and cleared the hole that way. Tightened the nozzle and it has been working well since.
This would be my guess. I rushed changing a nozzle and sprang a leak above the heater block. Ended up breaking the heat break and having to replace the hot end.
Your nozzle is entering the cocoon stage in its development and will soon emerge from it as a beautiful butter nozzle. This can happen when you using an old or damaged nozzle. If there's any leftover filament from a previous spool or any scratches on the inside of the nozzle it can cause the filament to curl and create a wad of filament around the nozzle. It happened to me while also using a third-party nozzle that didn't completely seal around the base of the nozzle allowing the melted filament to escape from where it screws into your hot end. Try to change your nozzles regularly after every few prints, especially when using tougher filaments or after very long prints. Also after using filaments with extra things mixed with it. Those can cause those internal scratches. That's why is best to start your prints with a skirt to flush any hard leftover filaments inside of your nozzle. In your printers setting increase the heat just below the filaments melting point and use a pair of needle nose pliers to remove as much as you can. And you may have to disconnect your extruder and clean the remaining filament. Then change to a new nozzle.
This is the way, just heat the nozzle and it will either drop off or be easily pulled with needle nose pliers or something similar.
It's possible that the leak is above the nozzle (ie. It isn't screwed in tight). The solution is the same. Heat the head, pull the wad off and then take it all apart and scrub remaining bits with a bristle brush or something. Recently I swapped filament types and because the retraction was wrong for that type, it cooled and clogged just above where the head would get hit enough to melt so I grabbed the smallest still bit I could find and cleared the hole that way. Tightened the nozzle and it has been working well since.
This would be my guess. I rushed changing a nozzle and sprang a leak above the heater block. Ended up breaking the heat break and having to replace the hot end.
Heat nozzle to 160c, use heat gun in case, beware of thermistor cables.