03 2.0 Car constantly steamed up - JonD
I was just reading a similar topic on a focus and thought i'd ask if anyone would have any ideas on the mondeo.

I always seem to get alot of water build up on the inside of both the front and rear windows. That much that i need to wipe the water off as the window heater and blower cant clear it. Is there a filter i need to check and maybe the coolant level?
03 2.0 Car constantly steamed up - Screwloose

Blocked pollen filters can cut the heater output dramatically. Under the scuttle trim, passenger side.

If the windows steam up while it's parked, then a water leak soaking the carpets is usually the cause.