have something weird going on with my glass too.
If the screen is totally clean you can't see it, but if after use it gets a little greasy/dirty, you start to see a streak on the glass on phone that has a type of shade on it that doesn't seem to be affected by grease/dirt. It looks to be a dark streak.
You can also see it when you dampen a wet cloth and clean the phone from side to side. A type of border of wetness is created when you wipe the phone with water (where the shading/streak is). Very strange, weird and hard to describe.
But again, when the screen is clear you can't see or feel any streak if you slide over it with your finger. It's there but it's not...