Right I've noticed that my front screen has some imperfections in it which is most noticable when raining as the wipers highlights what apears to be trapped dirt which in turn makes it impossible to drive the car at night when it rains

I've tried a glass cutter all sorts of cleaning products to no avail, but today I noticed that it has an anti-reflection coating which gliimers a slight purple (like on all renaults) This now leads me to belive that it could be the coating on the wondscreen that is faulty

Anyone else experienced this?