I see people at the car wash all the time regardless of the weather.
I haven't washed the Explorer in months. In fact, it has only seen soap twice since I got it in September. The times when it did see soap, I was planning on selling it. Since I have decided to keep it, it has only seen high pressure water. It is a beater, so it doesn't have to look perfect even though the paint is decent. If we get salt on the roads, I will pressure wash it frequently. When they salt roads here, they dump piles and piles on the road.