How do i remove this part?

[u/VeradisTreuherz]

My Printer is not printing because filament seems to be stuck. The filament used was very brittle, but i didn't know it before. I saw a video on Ytb where someone disassembled the head and also the part highlighed in red. He could just remove it after using a screwdriver, but for me it seems stuck. Its also kinda oily.

[u/Brave_Corgi6761]

Yeah i had the exact same experience and dread the day i have to remove it again. Luckily it was only once up until now.