My Prius has bad breath

isn't there some kind of ozonator that is supposed to rid cigarette smell? i think hotels use them.

 

Fram makes a Fresh Breeze Cabin Air Filter that may help a little.

 

There's not much you can do to rid the smell. I've seen some people use tree type air fresheners and place them in the cabin air filter section (make sure you changed out the original filter). That way when the AC comes on, you'll get a fresh scent of TREES or whatever that's in there.

 

You can also redecorate

http://www.car-freshner.com/userfiles/images/Little-Trees-Gallery/Black-ice-forest-kn.jpg

 

We just had some bodywork done, on another car we're babysitting. They detailed the interior, and dumped in some sorta cloying scent. I've had the car stored going on a week now with the windows cracked, done a short drive, scent's still going strong. I'd be cautious about throwing in more scent, just try to clear out the tobacco aroma. Baking soda??

Hmm, this has lots of tips:

How to Get Rid of Tobacco Odors in Cars (with Pictures) - wikiHow

 

I'd suspect something died in the dash. I had a family of mice that died next to the evaporator - it smelled terrible for a few minutes then would clear out, only to return once the car sat.

I had to pull the entire dash and airbox to clean them all out.

edit: try this below first:

Get an air freshener spray like Lysol/etc.

Take out the cabin filter.

Run the car until it is good and hot.

Blast the heat on fresh air mode.

Spray the stuff (entire can) into the external air intake over the course of a few hours. Prevent it from pooling by doing it slowly over time, but put the whole can in there. The goal is to avoid having liquid running inside the vents so you don't short stuff out.

The entire inside of the vents will be coated over and over by the thin layer of Lysol/etc. If it isn't something dead, this will take care of it.