RE agents rarely add value to the transaction and more often become an irritation. 90% are not professionals.

It is a toxic product before it is cured.

They may just have the next morning open on their schedule but may get really irritated if they have to do it now... who knows they could be working on a market analysis for a million dollar listing.

Toxic situation.

Others do it on site and you have to be careful of the way they dispose of their waste, especially liquid toxic waste.Some time back, I read of a lawsuit here in NY where the landlord and his dry cleaning tenant was sued over flushing hazardous materials done the drain, and then a sewer blockage caused contamination in the neighborhood when there was wastewater backup.

I bring back a bag of fruit each week in season and Tenants all pitch in to keep it clean we use a non toxic Pest Management as prescribed by our county so it all works. with 6 trees it provides for quite a few people I get all I want of Oranges,Lemons and Avocados. 

Many companies use items that only irritate bed bugs and spread them.  

Oh and the cherry on top is everything is potentially toxic!

(Sorry if in wrong forum, on my phone, please move if needed)It's funny that I'm a landlord and I've found myself on the other side in a pretty irritating dispute with an upnrofessional individual who is also a LL. 

It could be that the place is just rundown and you can fix it up and make a great deal out of it like @John Leavelle, but you also could be up against flood damage, pests, toxic mold, a prior meth lab, or any number of things.