it really works good for musty smells. i let my s10 floorboard get full of water and it smelled horrible and put them in for two day and then scrubbed it and it was gone

 

i heard orange peels work too..

 

orange peels just gives a citrus smell to your vehicle but coffee beans nutrealizes all smells then you add your air freshener of choice and thats what it will smell like. plus orange peels only last a few days if that

 

Detailers use an ozone machine where they feed a hose into the vehicle and leave for a day or so. Our dealership used them on all trade ins, gets smoke, dog, generally most nastyness out.