Canon iPF755 User Manual page 842

Maintenance and Consumables
2.
If paper dust has accumulated in the Vacuum holes (a) on the Platen or in the Borderless Printing Ink Grooves (b),
use the Cleaning Brush (c), provided with the printer, to wipe it away.
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Cleaning Inside the Top Cover
> Cleaning the Printer >
Note
• If the Cleaning Brush is dirty, rinse it in water.
iPF755