Permanent Stain Of Water Drop

Permanent Stain Of Water Drop

I purchased a new model of Maruti Wagon R CNG last year in June/July from the dealer. Now I find all glasses(including windshields) have developed permanent marks of water drops. At their authorized service centre, they said I might have used bore-well water for washing the car. Funny. Bore-well water in Navi Mumbai? I told the watchman to wash it with municipal supply tap water. I had tried Colin but failed. They admitted the water drop stain problem is common in this model. This evening, while at CNG station, I checked with other car owners. Everybody had the same problem. All glasses have got water drop stains. Why is this? My son had an Alto, its windshields never had this problem. Is this a cost-cutting measure by Maruti? Otherwise, the car is good. But all glasses have developed permanent water drop marks.