You spray your perfume, smell it clearly for twenty minutes, then nothing. Panic sets in. You spray again. And again. By lunch you are the person everyone smells from the elevator. You are not broken. Your brain is doing exactly what brains do with constant stimuli.
Why you stop smelling your perfume
Olfactory adaptation filters out persistent smells so you can detect new ones. It is the same reason you stop noticing your home's odor until you leave for an hour and walk back in. The perfume is still there. Others can still smell it. You have gone nose blind to it.
This is a feature, not a bug. If you smelled every scent around you at full strength all day, you would be exhausted by breakfast.
Nose blindness vs anosmia
Nose blindness is temporary fatigue to a specific scent after prolonged exposure. Anosmia is partial or total loss of smell, often from illness, injury, or a chronic condition. If you cannot smell anything at all, including food and coffee, see a doctor. If only your perfume disappears after an hour while everything else smells normal, that is adaptation.
What not to do
Do not add five more sprays because you cannot smell yourself. That is how overspraying happens. Trust that the scent persists unless someone tells you otherwise. Ask a trusted friend if you are unsure. They will be honest, especially if you promise not to be offended.
Reset your nose
Step outside for fresh air. Smell your sleeve or collar instead of your wrist for a different angle. Take a break between testing perfumes in a store. Five minutes of neutral air works better than coffee beans, which are a myth. See fragrance myths debunked.
In stores and at home
Limit how many scents you test in one visit. Your nose fatigues faster than you think. At home, rotating perfumes helps because you adapt less to any single scent when you do not wear the same bottle every day. See how to build a fragrance wardrobe for rotation ideas.