I have a VW which is coming up eight months old. I don't use it much so haven't noticed the problem until the recent rain.
When the weather is wet I am getting patterns/streaks in the glass not unlike I get when the car has been soaped and washed before it is rinsed. The patterns are not noticeable when it's dry.
Tonight it was pouring down and I really could not see through the windscreen due to the defractions (right word?) of oncoming headlights.
Getting home I tried polishing the inside and outside of the windscreen but no way do the patterns go. On a very small sample area I tried meths' and Mr Sheen but the patterns/streaks won't budge.
It is at its worst when starting up from cold. I can't drive the car until the windscreen is warmed right up due to the patterns/streaks.
The car is obviously under warranty and came from a main dealer so I don't want to mess about too much.
Is this a known problem? If it is not raining when I go to the garage it is going to be a bit hard to explain to them what is wrong. I am wondering if the car was treated with something before it was delivered and the something has ate into the glass.
Thanks for any help.