I made the mistake of cleaning the screen on my Sony 34" XBR with an ammonia-based glass cleaner for the first 6 months. Now I seem to have smudges on the screen that won't go away. (The smudges are only noticeable when light reflects off the screen and I am looking at the screen from an angle of about 45 degrees or less). I bought a glass cleaner (Glass Plus) without ammonia, but it just seems to move the smudges around. I am hoping someone can help with the following questions: 1) Is there a cleaner available that is specifically made for CRT screens, and where can I find it ? Should I not use Glass Plus ? 2) Is it possible I have destroyed the anti-glare coating on my screen ? And is it possible the smudges are the remains of the anti-glare coating ?