Here are some things you can try to resolve a scanner glass issue on your printer:

1. Clean the scanner glass with a cloth, soft brush, or compressed air.
2. Check for foreign objects inside the printer, such as scraps of paper or other debris.
3. Check the cables and connections between the printer and the computer.
4. Run a roller cleaning cycle on the printer, if needed.
5. Try changing the settings on the printer, such as the resolution.
6. Reboot both your computer and the printer.
7. If the issue persists, contact the printer manufacturer’s customer support line for technical assistance.