That became a 'THING' when car doors became part of the roof.
And yes, the only answer is to brush the snow off of that area where the door and the roof meet. Then be ready to also brush the snow off of the seat before you sit down.
Corectomundo....that is not a problem here in Florida or in any tropical climate.
But I didn't always live here and I do remember snow on the car seat. Yukkk!
It's one of those things that are so basic, I can't believe we're actually discussing it. It must be a slow news week.