Free File for Creality Ender!
I had noted that that nozzle on my printer was collecting cat hair(Gee, I wonder where that came from....). I realized that if hair or dust got into prints, this would be a bad thing. So I did what any other creative did....made a solution!
This is a simple part that is designed to be attached to the stock fan housing with some double-sided tape. Then you just cut a piece of foam and stick it inside. Air can still flow and cat hairs will be trapped. Problem solved.
If you have a Creality Ender series printer, you can download the file for free on Thangs or Thingiverse.