It prevents the dust-empty button from being pressed unintentionally. It happened to me every time I was cleaning the car, so I had to hoover it again :) That's why I decided to create a protector for the release button.

Supports are needed, but it should be fine to print on any printer with any material.
I used PLA Prusa Galaxy Black.
After printing, it may be necessary to use a little bit of universal superglue to attach the protector to the release button.