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> are you suggesting to use a mop when it rains to clean the water before it freezes

Wyoming here. We don't generally salt our roads. Instead, a combination of ploughs (to clear it) and gravel (to increase traction) are used.

More broadly: if you're "astonished with some people not having a grasp," consider that astonishment signals encountering something new.

The gall to complain about "not having a grasp on reality" while writing hypersimplistic reactionary comments. The evidence for Dead Internet Theory grows by the day.

With properly graded streets and sidewalks, liquid water runs off. When the bulk of snow is cleared, the small bits that remain melt, flow off, and/or evaporate during melting days. I can't comment on the specific climate of Berlin, but it certainly doesn't seem poised to be an arctic encampment.