system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What happens physically when we get "used" to smells, that we can't detect it anymore.
gpt
Kind of the same thing when we get used to pain, and can't feel it anymore. The sensors in your nose are still detecting the smell, and still sending signals to your brain. And, your brain still begins to process the smell. But, the part of your brain that interprets the smells stops processing the same inputs. 

So, technically, you are still smelling that smell. But, the subconscious part of your brain isn't telling the conscious part "it smells like mint" any more.