Oiler
thingiverse
A very simple oiler for your filament. Personally I don't use oil on my filament but I still use this with a dry foam sponge (like you'd use to clean a car) to dust that has settled on my filament out of my 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.