That looks like car wax residue to me. There also looks to be some overspray on the door panel in the photo of the mirror.Recently took my new RAV4 Prime to the car wash and after drying I found this mysterious stain.
View attachment 189674
I tried Goo Gone and All Purpose Cleaner and wiped and wiped for hours with limited success. I almost think it looks worse now. This stain can be found in the side mirrors as well.
View attachment 189675
View attachment 189673
Do any of you happen to know what this stain may be and how to fix it? If it helps, the car had a small paint repair done a week before, but on the front right bumper, nowhere near the stain. I would appreciate any help
A little fresh wax should soften the hardened old wax and allow you to clean it off before it hardens again.