@PeterK: Some of my roof rack mount covers have flipped up each time, but none have snapped. Now I'm wondering if (and how) I should secure them before my next trip. Is there any kind of temporary tape (e.g. painter's tape) that would be safe to use during a touchless wash?
@paulkva, like you I don't have time to do otherwise so while touchless is far from perfect it comes out looking much better and gets bad things like road salt off the car. I have had a few hand washes when in for pano roof and other fixes at the SC, and will spring for a seasonal detail wash, but touchless will continue to be the primary cleaning.
I've been thinking I should tape the roof rack mount covers down before going through. Next time I'm at the hardware store I'll pick up a roll of the blue 3M paint edging tape and try that.