Epson WorkForce AL-MX300DN - Manual (Page 201)

Cleaning the document table and the exposure window for Auto Document
Feeder
If a line of dots always appears in your scanned images, fax images, or copies, the document table or
exposure window for Auto Document Feeder may be dusty or scratched. Clean those parts.
a. white plate
b. document cover
c. exposure window for ADF
d. document table
AL-MX300 Series User's Guide
Cleaning and Transporting the Printer 201