Canon Pixma MP530 User Manual page 112

If the printed paper is smudged, clean the inside of the machine again.
If the problem remains after performing cleaning again, the protrusions inside the
machine may be stained. Clean them up. See
Important
Even if the Cassette is selected as the paper source, paper will be fed from the Auto Sheet
Feeder.
Do not perform any other operation while the bottom plate is being cleaned.
Cleaning the Protrusions inside the Machine
If protrusions inside the machine are stained, wipe ink off the protrusions using a swab or the
like.
110
Routine Maintenance
"Cleaning the ADF" on page 108.
Chapter 8