Yeah, auto washes are bad. Even the touchless can scratch your paint.. The machines filter and recycle the water, and tiny particles of rock and stuff still get through.. then it's like micro sand blasting your car.
If you don't really care about accumulating scratches, touchless might be otherwise safe.
i dont like auto washes.... i rather pay a guy that come round my work who washes our cars for $15. washes the outside cleans the windows cleans the dash, and any other hard plastic areas. as well as vacuums out the car. and leaves an air freshener
does a really great job at it too.
I had what sounded like a nut fall off a touchless wash. Luckily it hit the top of the windshield and didn't damage anything. Scared the **** out of me though, and I haven't been back to that place since.