The windshield ice can come from the ice on the outside of the windshield.
The ice will quickly cover up any scratches.
To clean the windshield, first clean it with a soft cloth or a soft toothbrush.
After that, rub the ice off with a dampened rag.
After the windshield is dry, wipe off the excess and rub in the cloth or toothbrush again.
Keep the windshield cleaner than you would a fresh windshield.
Use a soft towel or wipe with a wet cloth to wipe off any ice that may have stuck to the windshield paint.
The longer the windshield has been in the sun, the more ice is likely to stick.
The more ice, the bigger the potential problem.