Hello, I’m Nathan, and I’ll be assisting you today.
Sorry to hear that you’re having trouble with this but I’ll do my best to help you out.
What is the model of your printer/scanner?
This will be the result of contamination in the ADF. Lift the lid over the adf and check carefully with a flashlight for any scraps of paper, stray staples or paperclips, etc. Clean all exposed rubber wheels/rollers with qtips and rubbing alcohol. Blow it out with compressed air, then close it back up.
Lift the lid over the glass, then clean the underside of the lid on the far left side carefully, focusing on the thin plastic strip there (which is what guides the scanned page into the output tray), which is where the most dust tends to accumulate causing lines, rather than the actual glass.
No problem at all, Bruce.
The biggest place to focus is that plastic strip on the underside of the lid, and I think that will take care of it for you. I'll be here if you need anything further.
Do you need more help with this, Bruce?