Better be quick as it is still rainy days now haha..I think this kind of defect is difficult to detect in the manufacturing line. Out of 100 sure got maybe 1 or 2. Depends how lucky we are to get a good one.Take a photo when it happens, Take one focus on the headlamp only photo and another photo, take a photo of the headlamp together with your number plate. At least show them is really your car.
Another option, if u want to see such thing happen in your VW Headlamp again, send your car to car wash, surely will see it.
That happens to my 7 years old car, When it rains, my right hand side headlamp got vapor.
Left hand side one was okay. I think is time to do some sealant but before sealant, not sure
where I can get people to clean the inside of the headlamp. :hmmmm2: