Plastic filament dust cleaner from my model series for K1, I try to make simple models so that even a beginner in 3D printing can print them.To print, you need a Creality Print slicer and the standard settings set by the manufacturer.
1)K1 printer
2)Filament PLA
3)Nozzle 0.4,0.20 Initial layer height
4)infil density: 15%
5)Retraction standard for PLA 
6) Nozzle Temp 230° for Hyper PLA or the temperature indicated on your plastic by the manufacturer.
7) Non Support
I mainly use PLA (Creality Hyper Series) plastic for all my models, but you can use other types of plastic depending on your skills.
Instructions 
1) Cut out and insert the sponge into the center of the filter
2) Insert the thread into the special holes and secure with the lid