Wierd Lines Added on 3830 Scans from ADF

[Lillian1961]

When I scan on my HP Officejet 3830 using the ADF, the scanner adds two thick lines to the right margin of every page. These lines appear to have been added as a feature, but I do not want them. I have cleaned the glass bed, the ADF and the input tray many times, but the lines are still added. I have gone over every setting I can find. How do I get rid of these lines on my scans? If I scan one page at a time on the flatbed, there are no lines, but this can be a pain with a large document. Can you please help?

[Valsimot]

You need to clean the smaller glass on the left from the flatbed glass.

[Lillian1961]

I have cleaned and cleaned and cleaned EVERY INCH of the flatbed glass, both the larger AND the smaller areas. Still getting the lines

[Lillian1961]

I'm sorry but the offered solution of cleaning the smaller glass did NOT work. EVERY INCH of ALL glass portions have been cleaned, re-cleaned and re-cleaned AGAIN a great many times. I am still getting the lines. What's the problem?