To prevent the oily leadscrew of my Tronxy X1 to contaminate the filament, I'm using a bit of bowden tube to guide it. Since a while my filament spool is on a shelf above the printer. To prevent the filament from having to make a sharp turn or getting bend a lot, I designed this bowden guide.
It clamps the bowden tube in a straight line towards the extruder and acts as a springy guide for the filament. It combines well with any clamp-on filament cleaner.
Insert the boden tube by sliding it in from the side. Don't push it in from above, you will break the clamp otherwise!