It's not just yours mate. There seems to be a general issue with both GTI and GTD headlights getting misty these days. They only condensate on the lower and inner side. It is due to the poor design of the headlights that don't get any heat on the inner side when the lights are on because the inner U is not lit like the R headlights and the small position bulb is just a small LED that doesn't generate much heat to help the headlight not misting up. The only source of heat inside the headlight is the main beam xenon bulb that only heats the outer side which never gets misty.
Going to the dealer will not help as they will say it's normal and it will go off overnight which does most of the times but I had a few situations where the next day the headlights were still foggy.
At the moment this is the thing that annoys me the most about this car as it makes it look old and cheap. Never before had misty headlights on previous cars and I had xenon lights on them too.
