How to clean the platen (Instructions from Epson manual)

• Press the power to turn the scanner off, and unplug the power cord.
  • Caution: Always unplug the scanner before cleaning.
• Use a soft, damp cloth and mild detergent to clean the outer case.
  • Caution: Be careful not to spill liquid or let water get into the scanner mechanism
    or electronic components. This could permanently damage them.
  • Never use alcohol, thinner, or corrosive solvent to clean the scanner. These
    chemicals can damage the scanner components as well as the case.
• Clean dust and smudges from the document cable glass with a soft, dry cloth (a
  microfiber glass cleaning cloth is recommended). You can also use compressed air
  spray cleaner.
  • To remove grease, use pretreated lens or scanner wipes, or a small amount of glass
    cleaner on a soft cloth. Dry the document table glass afterwards.
  • Caution: Never spray glass cleaner directly on the document table. Always spray
    it on a cloth first and then wipe the glass .
  • Never use a harsh or abrasive brush or cleaning product to clean the document
    table. A damaged glass surface can decrease the scanning quality.
  • Avoid leaving photos on the scanner glass for extended periods of time, or
    residue from the photos may adhere to the glass.