I don't agree with what you wrote.

Just cleaning a windshield would not last! If the so called road oil or whatever is still on the road then it would smear up the windshield again.

I had put new Anco blades on the Grand Marquis and they smeared the windshield while it was raining.

I changed the blades to the Bosch Marathons and with the first cylce of the Bosch blades the windshield was wiped clean.

This was done to just one side at first and the comparison was right there.

All guns should be locked up when not in use!