Thanks! I know they coat their nozzles, but I never had one of their heatbreaks in my hand.
Then it seems
- a good amount of thermal compound
- optimising the extruder springs (see Constant extruder skips/clog warnings)
- potentially fine tuning the filament path (A solution for clogging - #13 by wudecao)
- and maybe increasing the distance between hotend and heat break by using E3D nozzles
might be the way to go.