So the car went into the dealership today, and they have removed the spots by polishing the glass. I couldn't get them to give me any more details, but the spots have gone, and for now I am happy.
I does sound like some type of water deposit marks then, which could be seen as a good thing ?.
It would appear it’s not a fault in the glass.
No amount of polishing would remove the marks if it was a manufacturing fault in the screen.
Maybe a repeat of this could be avoided by not allowing domestic water to air dry on the glass or bodywork in the future ?.
I washed my Dynamic red exclusive yesterday and when using a large drying towel on the body work, you could see the potential water rings forming on the paint work.
The towel removes them, but without this process it is easy to see how this happens.
If you have white body work, then this never a problem.
Not because it is not happening, you just can’t see it.
Darker colours are always more likely to suffer from this issue.
Regarding the wind screen, Auto Glym do a brilliant glass cleaning polish.
They do a fast glass spray, which is okay, but the glass polish is really good I find.
It’s a white cream polish and not a liquid water based product like the fast glass cleaner.
Hope this is of some help.