I raised this issue earlier but found no one else reported a similar experience. After several months with no problem, the driver's floor mat in our Air no longer stays anchored to the floor. I have cleaned both the plastic Velcro-like pads that are screwed into the carpet and scuffed the back of the foam on the floor mat to try to restore grip, but it didn't help. (Our 2015 Tesla Model S used the same attachment method and had the same problem, and I'm aggravated to see that the same bad idea made its way over to the Air.)
After seeing this thread, I've also decided to try to get Mojave mats just for the front of the car. While I love the look of the Santa Monica mats, using Mojave mats in the front will track the theme of seating: dark gray front seats and cream rear seats. We've had no problem with the rear mat staying clean despite hauling a good many friends back there, but the front mats are finally showing a bit of stubborn staining after seven months.
