Mentioned it to them when I was last there, and was told that regarding warranty on them. If after 10 mins of lights being on it cleared that was acceptable ?? I tried earlier and it didn't clear so may be a trip to the dealer again.
More concerned with getting the keyed bodywork sorted at mo, that's looking like it might have to be an insurance job as some of the prices I'm getting quoted are big !!
Is this condensation visible during the day or is it something you see only at night with the lights on (specially if you have LEDs?). If it is something you see at night only then pretty much all cars have this specially those with LEDs as the light makes these more visible.