This article is from the Toyota Tundra FAQ, by Steve Yee with numerous contributions by others.
Let's face it, your air conditioning unit not only cools the air, but it also
removes moisture from the ambient air as well. Trapped water can promote the
growth of mold, spores, and other funky fungi inside your air conditioning
There are three main ways to remove the smell, one of which also kills the
The first product is called Odor Gun. It is made by Medo, which is a division
of Pennzoil-Quaker State. It can be purchased at most places that sell auto
supplies and comes in a decent sized bottle.
The second product is called BG Frigi-Fresh. This not only kills the odor, it
also kills the mold and mildew that can accumulate. BG Products also sells a
similar product called BG Frigi-Clean, which also removes Nicotine oils and
other debris. BG Products can be contacted at www.bgprod.com.