I recently noticed that the interior glass was 'steaming up' a lot in the cold weather. I thought it might have been due to a damp coat I left in the car but it persisted and I found the driver's (RHS) footwell carpet was damp.
I don't seem to be losing any coolant so it's hopefully not a leak from heater but I'm curious to hear of any possible ways it's getting damp. I imagine it must be rainwater but not clear how it would get there.
Graham