Has anyone else noticed that when the iPad Pro screen is clean the Apple Pencil writes silky smooth but with some smudges it turns all scratchy and tacky? Can this be fixed via software? Not a huge deal and the 9.7 had the issue as well (just tested). I literally thought my 10.5 screen was defective but upon testing I can tie it to fingerprints or smudges on the screen. It still writes, it is just that with the smudges the tactile response from the screen/pencil is very different.