Usually wetness in the passenger carpet area means the heater core is leaking. I would have the dealer check it out.The passenger side front carpet is getting wet near to the area where your heal would be. Its quite bad and because of this the inside is really misty in the morning. Anybody elase having this problem?
Decades ago when I worked in an automotive glass shop, we had an ultrasound transmitter we could place in the car, and then a receiver wand we would pass around the edge of the replaced windshield to help identify leaks. If the dealership can't find the source of the leak, you may want to pursue this path.
Windscreen hasn't been changed.
Thanks for that. We would call it the bulkhead here over the pond.The firewall is the wall between the engine compartment and the passenger compartment which is designed to keep a fire in the former from getting into the latter.