The floorboard on the passenger side may get wet due to several reasons, including a leaking windshield, clogged or damaged drainage channels in the car, or a malfunctioning air conditioning system that causes condensation to leak inside the vehicle. Additionally, water can enter through damaged door seals or window seals. It's important to identify the source of the leak promptly to prevent mold growth and further damage to the vehicle's interior.
check sunroof for leakage
It's a Dodge thats why.
better check your heater core.
Check for a sickly sweet smell. The heater core is probably leaking coolant into the floor. The core is not repairable but can be replaced.
Check the undercarriage for rust holes. My Bonneville would flood when it rained because of a small hole in the passenger side rear wheel well.
Heater core failure.
It probably has a leak in the heater core.
You probibly have a bad heater core.
The heater is leaking coolant.
Your windows will fog up and it will be hard to clean them off are the passenger side floor board under the dash will be wet.
windsheild leaks
check your blower motor, located under the dash board. its on the passenger side. if the leak is on the drivers side, i have no clue. but my hubby's car is leaking water from the blower motor on the passenger side. found out at the car wash...