@Alfred LittonNot sure this is exactly what you need, but some of my favorite products:Ultraviolet air sanitizer( $30-50 on amazon)Odoban (HD)Lysol max coverVanilla glade plugins thereafter.

Like @Donald Howaniec said, if the smell is quite bad, rent an ozonator from Home Depot, set it for a few hours and get out of the house til its done (it can cause respiratory issues with people and animals/wilt plants).An ozonator machine will produce O3 (ozone) which when plugged in, utilizes electricity to sanitize the air.

When I went back to pay the cleaners (we do extra sanitizing after each tenant), the cleaners pointed out that the blinds had been replaced, and were half the size of the original blinds, and didn't reach the bottom of the window.Another example....

That's a marketing ploy and a little like calling yourself a sanitation engineer, instead of a garbage man!  

They are hitch hikers and the fact that they ended up in your apartment doesn't really say anything about your sanitation or lifestyle like roaches would.

Unfortunately our government "protects" people from investing in these deals and instead pushes everyone to the sanitized products that lower the big firm's cost of capital at the expense of helping Joe Six Pack accumulate wealth.I could go on and on...but I don't want to bore you to death ;-)

Over the years we have had some bad tenants who seem to always have problems like mice, bugs, damage, stuck drains, they move out leaving huge piles of debris we have to haul away, and they leave the place so dirty it needs sanitizing and a full paint job.

As my dad always says "sanitation comes before cooking!"

I want to know exactly what is going on and not a sanitized version.  

Plus if I purchase commercial space, I will not rent to WET businesses such as grocery store or fast food etc, they tend to generate a lot of problems with rodents, sanitation issues, etc.