(Even though a 4 oz. bottle is suggested, leave about 1 oz. unfilled so you can shake the bottle well between uses.) Shake the bottle prior to each use, and let it sit for about a day before making a conclusion that the aroma is too weak; the aroma can change after the air freshener has had time to sit.
Mist lightly in the room.
Be especially careful not to allow the air freshener mist fall onto furniture or into open beverages.