OK so I took it into SEAT - they couldn't find any issues/leaks etc. Anything else and I would need to contact SEAT customer service... as they can only repair faults. The head service guy was very nice, he advised me that it was likely due to the warm air in the car... he advised me to turn off the A/C before the end of a journey, and the best method is to open windows for a minute or two before leaving the car. I have also cleaned my windscreen inside, it's seemed to
help recently - no misting at all - but it hasn't been quite as cold!
One other thing I have remembered is that my Climate control flashed when I was using it the other day - only for a second or two. After checking in these forums (specifically here - ***.seatcupra.net/forums/showthread.php?t=172537), I have noticed that this could be due to a
problem in the A/C system. That post is to do with an
Ibiza, but I presume the system is very similar. It's only happened once though, about a week or two ago.
If the A/C was leaking, it could definitely contribute couldn't it? Weird that they wouldn't have checked that too when I took it in...
Please let me know how you have found that anti fogging solution
Cupra R Matt! I'm quite intrigued by it!