HP Color LaserJet CM4730 Multifunction Printer series - Manual (Page 233)

8. Locate the separation pad.
9. Wipe the pad with a clean, water-dampened, lint-free cloth.
10. Close the ADF cover.
Clean the mylar strip
Clean the mylar strips on the underside of the scanner lid only if you are experiencing a decrease in
copy quality (such as vertical lines) when copying using the ADF.
1. Open the scanner lid.
ENWW Clean the MFP 217