Windscreen icing up - Seat Leon

[CitroenC1]

Hi,
My windscreen is icy on the inside on cold mornings, grateful for any advice. Car is Seat Leon 2010. Here is my troubleshooting so far:

• Must be moisture in the car somewhere.
• Checked carpets and boot - all dry.
• The rear seat feels a bit damp - it's hard to tell but it may possibly be damp, certainly not soaking
• Poured a bucket of water over the whole car.
• Windscreen on inside still dry
• Checked door seals - rubber seals all dry, but here's where I am unsure
• The seal on the back doors - seems like a felt material - is wet. Not sure if it should be. Here's a pic - you can't see the moisture but the silver metal underneath is also damp.

Any guidance welcome, thanks

[GreenV8S]

CitroenC1 said:

Any guidance welcome, thanks

The leak could be anywhere and water will naturally tend to collect on the coldest surfaces such as the windscreen as the car cools down after a run. If you're able to get the ice out of the car rather than leave it to melt and evaporate, that will help dry the car out. If you have an ongoing leak you may find silica gel useful to get water out, but ultimately you will need to find and fix the leak. Your suspicion about the door seal looks like a good place to start looking. I'd expect to see a rubber on rubber seal around the door closure - sometimes this can dry out and lose flexibility. Rubber seal lubricant can help with that. The door should drain outside of that seal so worth looking for any drains in the bottom of a door that have got clogged.