I recently moved into a small studio apartment in Paris. It's incredibly charming but has one very strange feature: the kitchen and the toilet/shower are in the same room! I was a little alarmed to see this, at first, but ended up renting the apartment out of desperation (for a small budget, finding an apartment in this city is near impossible). Additionally, I constantly remind myself that I've got my own toilet (most studios in Paris have communal toilets with the rest of the floor...). Being that I'll be the only person in my apartment 98% of the time, I'm completely fine with this feature. I'm a very hygienic individual and this feature does not bother me in the slightest. However, I've got a friend visiting my soon and she was very hesitant when I told her about the situation, understandably.
So my question is, what is a good way to keep the room smelling fresh? There is no window and no fan. My current plan is to buy good-quality scented candles and just have them burn before and after use. Any other suggestions? Are there any plants or flowers that absorb odors or that emit natural smells? I'm not a fan of chemicals and sprays that are harmful to my health and the environment.