Just a thought: when I go to the gym, I don't mind the smell of cleaning solution. It makes me think that they are at least splashing it around and, at least, maybe cleaning the area. I also don't mind the smell of air freshner in the lockerroom. I know it just masks the smell of sweaty bodies but that's okay. I am fine with that. I even don't mind the smell of sweaty worked out bodies. I don't mean the nasty I-have-not-seen-the-inside-of-a-shower smell that comes from some people. It's a gym. You should smell worked out.
What I do mind is the smell of a chicken parm, Big Mac & fries, and pork fried rice as I try to finish my 30 minutes on the treadmill. It's not motivating at all. It's a bit nauseating, actually. I'm not sure what can be done when the staff break room is next to the cardio area. I would suggest shutting the door, at least. Maybe, encourage your staff to eat lunch away from the gym. I don't know. I just think it's not appropriate. Later.