If that is the case, you need to look at putting down a vapor barrier and if possible, vents to the outside. 

Hi @Stan TallmanHere are the most logical causesHydrostatic Pressure (Groundwater Seepage) - During or after heavy rain, water in the soil builds up pressure and forces its way up through weak points in the foundation.Slab Foundation Leak or Plumbing Issue - Even though you're on city sewer, it’s still possible for a drain or sewer line under the slab to be cracked or compromised.Improper Grading or Drainage - If water is pooling near the foundation and the grading isn't directing it away, it may seep under the slab.Improper Vapor Barrier or Slab Pour - If the vapor barrier under the slab was poorly installed—or skipped altogether—moisture will push upward over time.

He ghosts.He vanishes like vapor on a summer road.

Possible causes of mold:1) No exhaust fan, so water vapor collects on the ceiling and mold grows.2) Exhaust fan installed, but venting into the attic or inter-floor space.3) Water leak above the bathroom ceiling- Roof leak- Water supply or drain line leakHere's info on the missing washclothe bar:https://theblacksheepshoppe.blogspot.com/2023/10/how-to-repa...

(I don't recommend insulating the ceiling of the crawlspace--it will cause condensation and dripping.)Make sure there is some sort of vapor barrier on the floor of the crawl space--either thick plastic sheeting or cement. 

Crawlspace & attic inspection (vapor barrier, vent screens, bathroom exhaust, leaks)14.

My MTR market has completely vaporized in a matter of months (i.e., since February of this year!). 

Remediation methods can vary greatly depending on the type of and extent of contamination, ranging from soil excavation to more complicated soil vapor extraction systems.

Some of the most expensive and difficult properties in the country (and world) to develop were vaporized into potentially un-developable lots.

And of course you vaporize and can't even respond because it was for nothing.