Filament dust cleaner

Print 2x (it's symmetrical).
For each tool you'll need:
- 12x4 spring (12mm length, 4mm diameter),
- two pieces of foam (steal from kitchen ;p).

Teeth in front and spring made it really reliable. It's not my first cleaner, but it's the only one which have never slide down when using (among that I've used, of course ;p).