Hello, my car is in an underground car park this year for the first time during the winter and is therefore no longer automatically “washed” by rain or snow. At the same time I am through Corona in the permanent home office and the car is not moving for weeks. So that has car now a approx. 3 week old salt crust on the paint and so slowly I wonder how “healthy” that is actually? Is that enough if I go there today with a little water & sponge or do I have to n the washing machine? (also because of underbody?) Or is modern paint completely insensitive and I can leave it like this for months?