6D the missing complement to the Canon - own installation not recommended

Because just in my Canon 6D the horiz. and vertic. Lines are missing in the viewfinder, I decided to buy the TV screen. Of course, original Canon. Since Canon consumers to own change to expected. And this in itself is not the problem, yesterday I unpacked the package and exactly the instructions changed the TV screen.

I have performed in my office. Here all the windows were closed, no other person in the room. There was no wind.
The change took 8 seconds; with the included tongs.

Egebnis: Dust on the new ground glass on both sides. The mere pale down has only led to that was more dust on the disc. After about 40minutes blow, check blow, check I have but then brought the camera to the technician.

Conclusion:
It is not possible the TV screen without special means (suction, liquid) and to change without losing quality.
In view of the other reviews, I say that it is pure luck to change the focusing screen without trapping the tiniest dust particles.

The focusing screen itself, I can recommend. But please go to the technicians and installation can be!