Seiko Epson TM-H6000II Manuel D'utilisation page 13

English
Cleaning the Scanner
The glass part of the scanner may become dirty due to ink or paper
dust, which can decrease the image quality. To avoid this, clean the
glass part every 12 months.
1. Open the unit cover.
2. Inside the printer, push the levers backward to open the unit.
3. Wipe the glass gently with a soft, dry cloth.
Note:
When cleaning the scanner glass, do not use any liquid, such as alcohol,
benzine, or water.
Liquids can reach the back of the scanner glass and cause it to become
dirty. If the scanner glass has foreign matter that is hard to remove, such
as oil or grease, you can wet a cloth a little and wipe the scanner glass, but
never put any liquid directly on scanner glass.
TM-H6000II with Image Scanner User's Manual 13