Removing/masking an odor

[prepare4glory]

I'm renting a room for a few months and after a week or so of living here I've realized my room stinks. Thus I have:

-dry cleaned my comforter
-washed sheets/clothes
-dusted/swept
-no dishes/food
-there is a small, new, rug in the room. otherwise it's hardwood

I shower and don't stink. At this point I've given up finding out what the odor is and just want to remove it or mask it. I don't really have a preference (making my room smell like vanilla or making it smell like nothing are the same as far as I'm concerned). I just want something that will work.

So, any of those plug-in devices work well for making my room smell good or, more importantly, making sure it doesn't smell bad? Daily Febreeze is possible, but annoying, so I'd rather have something more permanent. Thoughts/experiences?

Danke.