Epson EcoTank ET-4550 - Manual (Page 90)

3. Open the document cover.
4. Clean the part that is shown in the illustration.
Note:
❏ If the glass surface is stained with grease or some other hard-to-remove material, use a small amount of glass cleaner
and a soft cloth to remove it. Wipe off all remaining liquid.
❏ Do not press the glass surface too hard.
❏ Be careful not to scratch or damage the surface of the glass. A damaged glass surface can decrease the scan quality.
Cleaning the Scanner Glass
When the copies or scanned images are smeared or scuffed, clean the scanner glass.
User's Guide
Improving Print and Scan Quality
90