Oiler
thingiverse
A basic cleaner for your filament, I personally choose not to apply any oil directly onto the filament itself but I do utilize this tool in conjunction with a dry foam sponge, much like one used to clean a car, to remove dust that has accumulated on my filament from the hotend and extruder.
Download Model from thingiverse
With this file you will be able to print Oiler with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Oiler.