I've tried those plug in scent disbursements, but they last so little.
Anyway, just curious is all.
I also store pefumed stuff in my drawers. For instance, if I buy a perfumed soap, I leave it there - I have an old excellent dirty jasmine soap that has been perfuming my underwear for months.
I also like a lot the carta d'Armenia / papier d'Armenie paper strips (paper strips scented with ambers). They are supposed to be burnt, but if let in a drawer they last forever and emanate a nice smell. Farmacia Santa Maria Novella makes a very good one; Kurkdjian has one too, but less intense. And in France you can find cheap but serviceable ones for a couple of euros in most pharmacies.