Indus Motors — Windshield complaint

I had purchased KL830030 on 01 Jul 21. The windshield of the car is fading during night journey (also without rain) and the same is not removed by using wiper or to clean with any clothes. The Sam has been informed in five times in Indus sercicing centre, Pathanamthitta. But they didn't find out the actual problems. They just clean the windshiled only. I think this a manufacturing problem. I am using maruti car since 2004, but this type of problem has not been faced till date. Therefore, look into the matter seriously and take remedial action at the earliest.