HP Color LaserJet 8550 Multifunction Printer series - Manual (Page 299)

EN
Routine cleaning 299
Cleaning the glass
Clean the copy module glass with a damp cloth or a mild detergent,
and then wipe the surface with a dry cloth.
Figure 64 Cleaning the copy module glass
Cleaning the copy module cover
Clean the cover with a damp cloth or a mild detergent, and then wipe
the surface with a dry cloth.
Figure 65 Cleaning the cover
CAUTION Be careful not to scratch the cover when cleaning it.