HP LaserJet M9040M9050 Multifunction Printer series - Manual (Page 190)

5. Open the ADF cover.
Figure 11-20 Clean the ADF rollers (4 of 6)
6. Locate the rollers.
Figure 11-21 Clean the ADF rollers (5 of 6)
7. Wipe the rollers with a clean, water-dampened, lint-free cloth.
CAUTION: Do not pour water directly onto the rollers. Doing so might damage the MFP.
8. Close the ADF cover.
Figure 11-22 Clean the ADF rollers (6 of 6)
9. Close the delivery guide and wipe its outside surface with the cloth.
176 Chapter 11 Manage and maintain ENWW