as my printer doesn't have an enclosure some times it really gets dirty from dust on the air, I had notice that mi filament accumulate a lot of dust in a shot time so I decide to remix the original part to include space just enough to filter the dust before it gets into the extruder with a piece of sponge.

Print instructions

just print it on the way that was print your original part, and the cap is printed upside down with the 0.2mm quality profile, printed on PETG, may be in PLA works as well