Anecdotally, the friends I know that work in shops with dangerous dust "routinely" forget to wear their protection. How can we actually verify that someone, who

Anecdotally, the friends I know that work in shops with dangerous dust "routinely" forget to wear their protection. How can we actually verify that someone, who is always diligent wearing protection, faces the same threats to their lungs? Not all masks are created equally either. Working around industrial equipment requires a respirator not just a mask.