Scratched the display - Air IPad 2

After initial enthusiasm, I realized yet that the pen scratched the display. The disk is too hard and when to get lost among dust particles, which can not prevent attracts times serious scratches in the display.
In the protector of my cell phone I've also tried. There you can see the scratches without dust immediately!
The plastic disc is not properly deburred.
Too bad. But it goes back.