The only issue I had with the cloth was one day I was rubbing a bit hard because something was stuck on the screen. I'm guessing something from my hand. It ended up rubbing off some blue lint and just shot it all over the screen when I rubbed. I wasn't very impressed with that.
I ended up grabbing my screen cloth from my Macbook Pro that is in my laptop bag. It worked MUCH better. The one that came with the car seems to be a little too rough.