But it could me mildew. You might hae o replace the carpet.
JonquilJan
Learn something new every day
As long as you are learning, you are living
When you stop learning, you start dying
Replacing the carpeting should be the very last resort. If you get no
answers here that seem to work, I would try AllExperts.com
Make sure to get unscented litter. There are LOTS of litters out there with
some truly vile odors! There's a "citrus" one which smells worse than fresh,
uncovered cat output!
Vent a window on a dry sunny day to help remove excess moisture from the
vehicle. Baking soda can help absorb moisture and reduce odor. Maybe shampoo
the carpet and vacuum heavily once dry.
Odorz Out
It's a canister of granular powder, found at the pet store, that
absorbs odors. It works great for everything I have tried, including
some musty rug after a water leak that went unnoticed for a while and
mildewed a bit.