Canon TS3300 Series Online Manual page 249

Is inside of printer dirty?
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During duplex printing, ink may stain the inside of the printer, smudging the printout.
Perform bottom plate cleaning to clean inside of printer.
Cleaning Inside the Printer (Bottom Plate Cleaning)
Note
• To prevent staining inside the printer, be sure to set the correct paper size.
Set longer ink drying time.
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This allows the printed surface to dry, preventing smudges and scratches.
• For Windows:
1. Check that printer is turned on.
2. Open Canon IJ Printer Assistant Tool.
Opening the Maintenance Tool (Canon IJ Printer Assistant Tool)
3. Select Custom Settings.
4. Drag Ink Drying Wait Time slide bar to set the wait time and select OK.
5. Check message and select OK.
• For macOS:
Set the waiting time using Remote UI.
Opening Remote UI for Maintenance
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