Daily Maintenance - Fujitsu 3091DC Operation Manual

4.2 Daily Maintenance

To use the image scanner over a long period of time, you must perform
some tasks daily. Keep the following point in mind:
Check that both edges are closed completely
If the equipment surface, document support, or automatic document
feeder is soiled, clean it according to Section 4.3, "Cleaning."
Especially, be sure to clean the automatic document feeder.
M3091DC Image Scanner Operation Guide