Odor has a source, and masking is not removal
Air fresheners and scented products add a smell on top of a smell. For a day or two the room seems better, then the covering scent fades and the original odor is exactly where it was. Real odor control removes or chemically destroys the material producing the odor. Anything else is a countdown.
Finding the source is most of the work. Odor is almost always coming from a material that absorbed something — carpet pad, subfloor, drywall, upholstery, duct interiors, or the pan under an appliance — and cleaning everything except that material accomplishes very little.
