Why do people who work in a perfume factoty no longer smell the perfume after a certain amount of time?

People who work in a perfume factory often become "nose-blind" or desensitized to the scents due to prolonged exposure. This phenomenon, known as olfactory fatigue, occurs as the sensory receptors in the nose adapt to constant smells, leading to a diminished ability to detect them over time. As a result, workers may no longer perceive the fragrance in the same way, impacting their ability to evaluate or identify subtle nuances in the scents they work with.