Citrus Magic (advertised by Tony Snow on his radio show) is the best air freshener I've ever used and contains no chemicals. There's another aerosol spray can w/similar contents called Pure Citrus. I bought one of these to compare q/Citrus Magic. It's good too, but I prefer Citrus Magic.
But this may help
http://www.ciao.co.uk/Febreeze__Review_5142664