HP Scitex FB950 Printer series - Manual (Page 86)

5. Using a long cotton swap that is saturated in isopropyl alcohol, clean the top and bottom slit by
inserting the swap into the opening from the input-side of the sensor (versus inserting from the
user-end of the sensor).
CAUTION: Inserting the swap from the user-end toward the service-end may push debris into
the slits. Insert the swap moving from the input-side toward the output-side direction. Do not wipe
across the slits, as this will force debris down into the openings.
80 Chapter 5 User cleaning ENWW