Windshield problems of the 2004 Dodge Sprinter

We own two Dodge Sprinters 2500. Years 2004 and 2006. We have owned both for a little more than a year. We have broken six winshields. We have looked for stronger windshields none are made. { per ppg} we have had installs done by factory and private. The window fames have been inspected for defects and none were found. We feel that this unacceptable and needs to be fixed. I have contacted Dodge and they said that they will do an internal reviewbut we will not be notified. Currently this is a great hazard and cost.