[vettestr]

If the glass has cracked a couple of times I would be checking for improper twist or pressure on the glass/frame. Check for the mount to chassis rails that hold the windshield frame somehow being mis-aligned or the body hitting the glass frame.

The body should not be touching or putting force on any part of the frame around the glass. The rubber across the bottom of course contacts the body but the chrome frame around the glass should not be sitting on or touching the body. The very corners are close to the body but not applying any real pressure or body flex and movement may cause cracking.

The frame of the windshield should be supported by the side rails. These rails need to be mounted or attached to the chassis. The rails when mounted properly should be firm and properly aligned so not imparting any twist or force against the windshield frame or that may cause cracking of the glass. These things are not manufacturer specific just common things to verify. you will get it whipped.