> They don't make the air fresher, they mask bad odors I read a little while ago there are some which just add scent to mask the smell, but others have a dough

> They don't make the air fresher, they mask bad odors I read a little while ago there are some which just add scent to mask the smell, but others have a doughnut shaped molecule which captures the smelly molecule. It doesn't 'clean' as such and does nothing to stop the source of the smell though so perhaps calling it masking is correct. I don't know enough about the specific science of cyclodextrin, I've put a couple of links below. https://www.direct365.co.uk/blog/how-air-fresheners-work/ https://www.direct365.co.uk/blog/how-air-fresheners-work/ > The key to odour eliminating air fresheners is a molecule called cyclodextrin. This is a donut shaped molecule suspended in a water carrier. Due to cyclodextrin’s hydrophobic interior, it attracts the odour molecules in the air. As the water dries, the molecules on the interior of the cyclodextrin are encapsulated inside, therefore reducing their volatility and minimising their smell. https://helix.northwestern.edu/blog/2015/06/take-whiff-chemistry https://helix.northwestern.edu/blog/2015/06/take-whiff-chemi... > When you spray Febreze the hydrophobic cavity of the β-cyclodextrin traps these volatile, odor causing molecules, preventing the molecules from binding to the odor receptors in your nose