I have been plagued by a ordor on my open back porch.  It appears that
a animal (possum, racoon, etc.) had died.  I have tried lime but, that
has not helped.  I cannot pull up my porch as that would be extremely
expensive.  I need some suggestions.  I am sure others may have
encountered this problem.  Is there something on the market to buy to
stop it???

Hello Harried,
Thank you for your question.
One of the following products should take care of the problem for you:
ODOR DESTROYER - target odors: dead animals, mildew, smoke and decay,
excrement of animals including urine and faeces. The Odor Destroyer
will work on small problems.  It is handy to use when the place to
treat is known.  It combines an enzyme and a mild masking agent so you
can remove odors quickly and completely when you are able to treat
specific spots. It can be used in attics, basements, crawl spaces,
walls, and just about anywhere the odor is present.
http://www.bugspray.com/catalog/products/page94.html
DISPOSE ODOR NEUTRALIZER - target odors: dead animals, mildew, smoke
and decay. If the animal smell is somewhere inaccessible, you should
use Dispose.  This product is nothing but an enzyme which is able to
surround the smell, in effect consume it and then remove it from the
air. It can be used in attics, basements, crawl spaces, walls, and
just about anywhere the odor is present.
http://www.bugspray.com/catalog/products/page93.html
Information on odor control:
http://www.bugspray.com/catalog/products/page200.html
   
Contact:
U-SPRAY, INC
Phone: 1-800-877-7290 or (770)985-9388
mailto:support@bugspray.com
   
How to order:
http://www.bugspray.com/catalog/products/page118b.html
Online order form:
https://commerce.mindspring.com/www.bugspray.com/form.html
    
I hope this information is useful!
regards,
Jackburton-ga
   
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Search terms used on Google:
[ "dead animal" "clear the odor" ]
://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=%22dead+animal%22+%22clear+the+odor%22
[ "dead animal" stop smell ]
://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=%22dead+animal%22+stop+smell

You can definitely hire a pest control service.  They search, clean,
and get rid of odors, if you don't want to deal with it personally.

Claudietta