This is small and neat filament cleaner. Its made from 2 parts. 

To make this work:

Step 1: Print both parts and try if filament fits trough small holes if not drill them out with right drill bit.

Step 2: Take a sponge and cut a cylinder from it that will fit into the bottom part as shown on an image.

Step 3: Put the lid on and now you can lead filament through. It will catch any dust particles on the filament and you won’t clog up your nozzle.

Note: I recommend to put this before your extruder or filament detector as I did.

The last photo is after 3 days of using.

Hope this helps.

Don’t forget to check out my other models too.