Sovol SV05 heatbreak is slipping

Hi, I just opened my Extruder + Heatbrake/Block in order to check if it had clogged.

I put everything back together and noticed that the heatbrake is slipping up and down, so i tightened it more, but it kept slipping and now the screw is damaged and i cant screw it out anymore…

What am I doing wrong or is it just a bad design?

Hi, could you pls try to follow the video below to clean the nozzle?

If it does not work, could you take a pic when you dissemble the extruder?