All good points there...also sounds like you may have an efflorescence issue. This is from moisture migrating up through the floor and walls. This usually means there is no plastic under the floor to stop moisture, and no moisture dampening on the exterior parts of the foundation wall.
Sounds like a dehumidifier is your next purchase. And just maintain what you have.
The other solution is digging things up and that may not be worth the trouble.
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