Chosen Solution

How to clean/replace scanning roller in Auto document feeder in cannon image class 4350 printer.( Streaks appear in copies while using Auto document feeder)

This is a super easy fix. i had this problem and all it took was a microfiber cloth to remedy it. just whipe the scanning surface at the left edge of the scanner with the cloth be sure to get under the plastic feeder too because when you scan with the ADF (auto doc feeder) that small space is the only optical point of contact with the document and if there is dust than big black streaks

Hi @Josh Wilson Here’s a Here’s a video that may help. Start at about 0:58 seconds into the video. I realize that it is not for Canon printer but most printer ADFs work the same.