water drops on glass

On many windshields of cars after 2000 or so there are these little sparkles like the glass has hit sand or grit. It reminds me of cars that have been driven in desert storms or so on.
I haven't seen this this in my area on other makes. I used to drive Tacomas in some real messes on and off road. Of corse the frames rusted our by 100k miles but the windshields were pristine.
My tech said he's noticed the same thing and he works on these cars every day.
I'll try and get a picture of what I mean - it is distracting at night.
I wonder if there is a treatment or glaze that would fix this. I change wiper blades poperly and so on.
Any chemists have an idea of affix?
http://www.cleanyourcar.co.uk/interior/cat_10.html
they do high end detailing products
It's because German automakers use softer glass than American or Japanese. Some speculate it's to reduce the chance of windshield shattering should a pebble smack the windshield if someone were traveling 90+mph on the Autobahn. Not sure the reason why. Only fix I can think of is getting harder glass (re: not MBZ OEM) or not traveling closely behind fast-moving vehicles (esp. 18 wheelers, trucks, and cars with wide rear tires). God help you if they're running slicks.

It's because German automakers use softer glass than American or Japanese. Some speculate it's to reduce the chance of windshield shattering should a pebble smack the windshield if someone were traveling 90+mph on the Autobahn. Not sure the reason why. Only fix I can think of is getting harder glass (re: not MBZ OEM) or not traveling closely behind fast-moving vehicles (esp. 18 wheelers, trucks, and cars with wide rear tires). God help you if they're running slicks.
Is there a windshield glass industry spec on glass hardness? (Somewhere I remember Mohs (not ohms) law of hardness.....)
That way I could make sure I am getting proper glass.
Would the afermarket have the features, eg, rain sensors, built into a MB windshield?
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Is there a windshield glass industry spec on glass hardness? (Somewhere I remember Mohs (not ohms) law of hardness.....)
That way I could make sure I am getting proper glass.
Would the afermarket have the features, eg, rain sensors, built into a MB windshield?
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