Most soap is not good with rubber. It is hard to remove; and, supposedly it might degrade the natural rubber (over a period of time).

DO NOT USE SILICONE-based/containing LUBRICANT.

I did not want to offer this: I have a NORS GM 1954 windshield.
I did not want to take it out of the original shipping box.

Measure your windshield, top-to-bottom in the middle.
I will compare that measurement with my windshield.