Filament cleaner for Ultimaker

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It's worth considering leading your filament through a sponge to automatically remove dust, hairs, etc. After searching for one compatible with my Ultimaker, I designed a simple version using OpenSCAD. The sponge causes minimal friction, so there shouldn't be any issues with printing or retraction. I'll monitor the results and possibly modify the design as needed. The scad-file makes it easy to adjust dimensions if necessary or desired. I've created stl-files with and without screw attachment and square cutouts for added versatility. Cleaner.stl is the simplest version, simply clamp it onto the filament feeder. Cleaner_screw.stl attaches using a pre-existing screw. Cleaner_squares_screw.stl and cleaner_squares.stl are identical except for square cutouts in the sides and back to reduce weight. However, these designs can be more challenging to print. Cut a piece of sponge and feed your filament through it.