Be sure to smell any products that you intend to use on the interior of your car. Some of them have very strong odors and they can linger in your car for weeks.
I remember I once got a bottle of cheap interior cleaner and just went to town with it. I rubbed it into every surface of my car. I knew from the start that the smell wasn't great but I thought it would go away after I drove around with the windows down for a second. Well, it lasted much longer. I almost considered selling the car because of it.