Yes, most of the glass cleaners will do. The important is using one that doesn't leave any stain or be corrosive.
I'm glad that is much better now.
Yes, there is a cleaning solution used by the field engineers. I'm not sure if you can buy it from Xerox, but is free for customers with contract to clean the top glass.
Once again sorry the confution about my posts.
Please consider to "Accept as a solution"
Sorry the delay. My colleagues have the same opinion. This copier should have a second mirror only for the SDF.
Attached is a scanned image. The streak is very light so I increased the scan resolution in hopes that it will show up for you to see. Note the light streak on the right side of the page running from top to bottom. Thanks for the help.
I'm really sorry about that. Next time I will read what I wrote. Really sorry. ADF is automatic doc feeder and yes is the top feeder. To see if it uses one or two lamps, when you open the top you should see the car (where is the lamp) moving to the side a little bit. But almost for sure you have only one lamp.
From what you described it only can be a dirty mirror or glass, but you stated was clean. Can you scan a doc with the symptom and post here?