Skip to Content Information Center
Lexmark T640

Lexmark T640

How to properly clean the glass on the flatbed scanner


This article outlines the proper procedure for cleaning the glass on the flatbed scanner of an X4600 series scanner. Following these instructions will reduce the risk of damaging the glass and the scanner. Clean the scanner glass at least once a month as part of routine maintenance to help maintain optimal print quality. In addition, it is recommended that you try cleaning the glass anytime you notice streaks or other print quality problems occurring with your scans.


  1. Power off the scanner unit.

  2. Open the scanner cover.

  3. Moisten a clean lint-free cloth or paper towel with an ammonia-free, deionized glass cleaner.

    CAUTION! Do not spray the cleaner or any liquids directly onto the flatbed scanner glass or backing material. In addition, do not clean the glass or backing material with any sort of alcohol or with solvents other than glass cleaner.

  4. Carefully wipe the surfaces of the flatbed scanner glass (A), the automatic document feed scanner glass (B), and the backing material (C).

  5. Allow a few seconds for the surfaces to dry.

  6. Close the scanner cover and power the scanner unit back on.

Contacting Lexmark Technical Support

If you have questions about any of the steps above or if you are experiencing problems with the scanner, please contact Lexmark Technical Support. When contacting Lexmark, you will need the scanner's model type and serial number (SN). This information can be found on a sticker located on the back of the scanner. Please call from near the scanner in case the technician on the phone asks you to perform a task involving the device.


Was this article helpful?