Well there isn't any salt down here in Florida, and I think you'd feel different if you experienced our rainy season where it literally rains every single day for weeks at a time. I wash my car and it's dirty right away after it rains again.Too funny. I wash mine all the time at the car wash. In the summer I wash it at home. I don't think it's a waste of time. You want to get the grime, dirt and salt (winter) off the car.