The biggest causes of the rubber gauling or tearing is usually down to the glass edge being poorly finished,lack of 'lubrication' or poor quality rubber.

The main trick is to use the edge of the glass as a lever point keeping the plastic stick to as near 90 degrees to the glass and roll the lip over the glass using a twisting motion like this.

Last edited by jockbolter50; 09/16/2012 4:27 AM.
1950 Chevy Advance Design 3100 in Scotland
In the Stovebolt Gallery
More pix on Flickr.
I've definately got this truck thing in my blood ... my DNA sequence has torque settings
"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.