Washington, lot's of moisture there? 

Hard for hipsters to penetrate.- Latino neighborhoods are low hanging fruits due to low income, ease of displacement and relatively lower crime rate.- Afro American neighborhoods are susceptible but will take a longer time.

Buy a moisture meter and live by it.

It also has a tendency to soak in any type of moisture that touches it, to include, drinks, food, urine and other bodily fluids.

At this point, the power has been off for over a year and no attempts to manage the moisture (even with a regular dehumidifier) have taken place in atleast 3 years.

I used a memory foam pad with a water proof barrier so stains can not penetrate into the pad. 

I send handyman over to inspect the situation and he said the mold is literally only where the bed was but he (and tenant) think there might be mold behind the sheetrock and arrange for him to come back Monday (tomorrow) morning to remove the sheetrock, check for moisture behind and replace/repair.

Turned out the attic had no ventilation (due to the age of the house) so all the moisture from decades of rain and such covered the attic with mold.

I always keep a fan in the bathroom pointed as high as I can get it to keep moisture level to a minimum.

Just trying to figure out how the moisture got into the building.