I don't know what they used but I would get some very fine steel wool & test it on a spot out of view. I don't know if they used any soap or anything else. I will try to find out and let you know.
I went to dealer and they finally saw the little dots and talked to Ford about this with no solution. They said they are going to use fine steel wool on it and it worked? Don't ask me why or what it was but it's good now.
Yes I have 2022 XLT with the same thing. It is noticed when in bright sunlight and looks almost like overspray but it's not on the glass it seems to be in the glass. When the sun is on the windshield it can be hard to see clearly. I havn't checked with dealer shop yet.
If I find out anything...
I have 22 Maverick XLT HyBrid. The windshield has a lot of very small dots that look like overspray but they are not on inside or outside. They only show up when the sun is on the windshield? Anybody else have this?