Do not worry
It is not difficult to deal with
When occurs clog
Because of gap
If there is a gap between steel throat tube and copper nozzle, the half melt filament could effect the fluidity
We have to avoid the gap
Method like this
Cut a little white Teflon tube , it’s length is same as the steel throat tube.
Insert the white Teflon tube into the steel throat tube.
Mount it into the aluminum block meet the copper nozzle.
No gap now
Then mount whole block to the heat sink
Dismount and mount like this
Dismount the steel throat tube like this (refer to pic below)
Avoid gap: method: B meet D meet together in C. (refer to the pic)
Be careful these black screws, the screws is a little soft.
So, Do not use much strength to tighten or loosen them ,
Other wise, it would be damaged.