Joseph Meehan wrote:

...most of the time the only fix is to keep the water away from
your foundation in the first place and second to provide additional
ventilation or dehumidifiers.

The problem may be too much uncontrolled ventilation, esp in an older
home with lots of air leaks or a slab with no vapor barrier.

True, while less likely in my experience it is certainly possible...

This came from a Humidex installer who said they help more with older houses.

Nick