., particularly on the valley, chimneys, and penetrations.  

But, if mold is the result from them not using the effective bathroom fans that are in place, they will be in violation of the lease and will be held accountable for any moisture damage that results, such as mold.3) they saw the ceiling fans when they looked at the unit.  

Could be because of something with the downstairs shower and the moisture rising?

And check the moisture situation.I don't know about hiring a gardner.  

The tenant believes moisture is getting in from under the unit, however, we believe this is from their lifestyle. 

From the underside you can see there as been moisture beforeThis is our first rodeo so after getting the builders opinion and servpro we went ahead and called our insurance.

Would not running air conditioning setup conditions for moisture and mold to develop in the unit during the heat of the summer? 

I have known landlords who had to regrout floors because the urine had penetrated it and could not be cured. 

Back when I did I was as clean as I could be about it, but cigarette smoke penetrates everything, especially in enclosed spaces, no matter how "clean" you are.Going outside to smoke seems to be more acceptable now.

Try to identify the smell... grease, pungent food odor, mold/moisture, tobacco/other smoke, plastic off-gassing, paint off-gassing, pet smell, rodent odor, etc.