I have a great tip for keeping a fresher smell in the garage. Use one of the air fresheners that you can hang in your car. These have a strong perfume to them and work better hanging in the garage. Our cat also lives in our garage and this keeps his area smelling great too.
Source: I got one of this fresheners given to me at a car wash recently and couldn't stand the strong smell in the car so I just hung it in the garage and it worked better.