You have no idea how bad they really are. I am a manager at one, it's a job while I finish college, and they will strip the protection off. We use a strong acid, followed by a weaker acid, then a base that has "acidic" properties and a few other very strong bases and other chemicals. In the summer, at least here in Chicago, is the worst time to go through an automatic wash. We turn the ratios of all of our products up much higher than in the winter to clean the oils and other such mess that get on the car from rain water, etc. In the winter the chemicals in the wash are much lower but will still strip the protection off of your paint. Not to mention the amount of contaminants that get stuck in the cloths that hang from over head. Remember that touch-less washes are different than touch-free washes. Neither is good for your paint though.