Is it okay to get the Model S washed at a touchless car wash that drags the car though? I know the hand wash is preferable, but I prefer the touchless machine car washes because they're so much quicker -- in and out in a couple of minutes. Do I need to put the car in a certain mode? And is touchless really necessary, or are the other types of machine wash okay? Are the washes with the soft brushes okay?