You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
Whether they do that much is debatable, I found they helped on my old '18 but they didn't budge on that car. I wiped down everything with alcohol first and used the adhesive promotor provided as well. As always ymmv.
Definitely always dirty. My Subaru outback with double factory seals does not have this issue. Subaru does many things much better than Tesla which I don't white understand given the Tesla price point and how easy it would be to make the Tesla better
I own a 2020 M3LR and a 2007 Volvo XC70. I find that the Volvo's sills get just as dirty as the Tesla's. None of the road dirt gets past the sills in either car so I just wipe them down once in a while. No big deal (for me)