Water in truck cab issue

[Dodge68charger]

Hey guys just wondering if you could help me out. I ve been noticing alot of water sitting on the rubber floor mats of my truck and not sure where its coming from. Its does not appear to be sweet smelling like antifreeze. The truck was inside a heated garage with windows down for three months and always water in it and now we got 25 degree weather and im still finding water in the truck. Any thoughts
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