Please recommend a diffuser with a subtle scent that lasts a long time.

My husband has a distinctive scent. When I was pregnant, I hated it so much that I wouldn't even let him come near me.

It's not like that right now, but when I stay in my room for a long time on my days off, it feels like that scent lingers. I'd like to put a nice-smelling diffuser there, so could you please give me some recommendations?