Recently I suggested switching everything you can to unscented products. That only works, however, if the smells are coming from the products.
Sometimes there truly are strange smells in a space.
Maybe it’s a basement that can never quite shed those musty odors, or a home located just a little too close to the local paper mill. Whatever the reason, consider getting some odor eliminators to leave in your space.
Air fresheners are also a possibility, but remember that many people have sensitivity to smells. So if you go that route make sure to pick something neutral like citrus.