Confounding Clogging

Riddle: A device starts clogging up as a man is using it. He sighs a breath of relief as he realizes it's working perfectly. What is the device?

Answer: A respirator mask/filter

Source: https://www.riddles.com/9994

A device starts clogging up as a man is using it. He sighs a breath of relief as he realizes it's working perfectly. What is the device? — Confounding clogging by Ron Dong v1.

Riddle: A device starts clogging up as a man is using it. He sighs a breath of relief as he realizes it's working perfectly. What is the device? Answer: A respirator mask/filter — by Ron Dong v2.