If you see
ink on the back of a printout, you can clean the paper guide
rollers to remove any excess ink.
If printouts are smeared or scuffed, load plain paper in
the paper source that you want to clean in this size: Letter (8.5 × 11 inches
[216 × 279 mm]) or A4
(8.3 × 11.7 inches
[210 × 297 mm]).
Press the home button, if
necessary.
Select Maintenance > Paper Guide Cleaning.
Follow the on-screen instructions to clean the paper
guide.
Repeat these steps as necessary until the paper comes out
clean.