One has to salute the genius at the agency who came up with the Febreze "nose blind" ad! It would appear my home is a nest of ghastly smells, generated by me, kids, food, dogs, toilets and other horrors OF WHICH I AM UNAWARE! I am nose-blind! And I am also now paranoid about visitors (fat chance!) and must spray everything, including myself, before receiving guests. I actually bought some. But how do I know it works?