After you have copied over 5,000 pages using the ADF, or if streaks are appearing, clean the ADF separator rollers.
Open the ADF cover.
Unlock the separator roll.
Remove the separator roll.
Use a clean, lint-free cloth dampened with water to wipe the separator roller.
Reinstall the separator roll.
Lock the separator roll.
Use a second clean, lint-free cloth dampened with water to wipe the other separator roller while gently rotating it.
Close the ADF cover.