Canon DR-2050C Path-Through Scanner "line appears middle scanned pages" Questions

line down the middle of my scans When I scan pages, there is a vertical dark black line down the middle of the page, and fainter ones on either side (about 2 inches apart). Is there a way to clean the

...line appears in the same location, it is definitely dust sticking to the glass. How thick is it? If it is thick, it may be because of an LED failed to glow, but this is etremely rare. If you are ...

...line down the middle of every page that I scan There is a speck of dirt or some such on the ADF Scan glass not the flatbed iteself. As the paper travels over the glass the speck of dirt is being seen ...