One of my pharmaceutical companies is developing an antidote to nerve-agent exposure to protect the US military from chemical weapon attacks, which shows that I'm always looking for opportunities to create value in places that others have overlooked. 

Do not encourage anyone in the buildings infested, your units or otherwise, to use 'foggers' because while they may work, what they generally do is spread the issue.I'm relatively new to the forums here, so i don't know if it's allowed to say so in a post...but if you'd like to send me a private message i can tell you the chemicals i used (which are available through the worlds largest online retailer......) and, at least in Michigan, do not required any sort of license to use. 

These are non repellent barrier treatments and the primary treatment is done by trenching around the foundation and pouring in the mixture of chemical.

I had one recently that I couldn't clear with a snake, chemicals & water pressure etc.

@RichardCrouch, I just used Shawn Huss at Chemical Bank for a refi on one of my rental properties in Memphis. 

The contractor that we've been working for month has had AC coil replaced to a new one as well as organic chemicals sprayed into the system, the procedure was performed three times and helped for a short period of time.The issue that is being described here is also known as "dirty sock syndrome". 99% of the time it's getting solved with coil replacement.

As an example, first we called people mentally retarded and that became a negative so we changed to mentally handicapped and that then became negative so now we switch to handy capable or some other name which will eventually take on the same negative connotation. 

Our local economy, by my estimate, is about 20% shipping/imports, 30% fuel production, and 60% petro-chemical (plastics, clothes, 95,000 different chemicals extracted from oil, etc).

I am a 'retired' chemical engineer looking to become a Real Estate Agent/Investor in the Tampa, FL area.

Sealing cement floors is a toxic chemical heyday.Discovered that I could then change the "use" with the city from industrial to residential.