Clean the outer case with a cloth dampened with mild detergent and water.
If the scanner glass gets dirty, clean it with a soft, dry microfiber cloth. If the glass surface is stained with grease or some other hard-to-remove material, use a small amount of glass cleaner on a soft microfiber cloth to remove it. Wipe off all remaining liquid.
Remove the document mat and clean the transparency unit window as described in step 4.
Caution: Do not spray glass cleaner directly on the scanner glass; otherwise, the fluid might leak inside the scanner and damage it.