I can relate to this problem dude! Any time I actually tried to wash my mustang by myself, I would always get those stupid spots! I really hate them actually, but what is really interesting, any time I get the car to the dealer washes, it is perfect, and I am actually trying to use the same solutions and do everything in the same way! I guess I will go to the https://www.newportnewsmobiledetailing.com/ detailing center, and maybe they would be able to help me with this ... issue, I guess. I just do no understand how and why those spots keep on appearing.
