Why do you stop smelling fragrances after a while e.g. room fresheners after you’ve been in the same room

Question

For example you open a new air freshener and you smell it and it lasts for a few days but does your nose ‘get used’ to the fragrance and you stop smelling it?

In: 22

Answer 1

Sense of smell is based od chemical reactions with a particke in air. So longer one of detectable particles are in air less and less reagents there is to detect and we run out of it after some time