Simplest, cheapest, lightest filament cleaner !
thingiverse
What you need : - a zip tie - an approximatively 25x25x25mm "magic sponge" (white melamine) cube. Can be bought on many online shops, often for around 1€/1$ for 10 pieces. Just put the zip tie around the sponge cube, then push the filament through the sponge.
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