Canon S900 - Manual (Page 34)

Printer Properties Dialog Box Description 34
Printer Driver Functions (Windows)
Maintenance Tab
(1) Cleaning
Click to start printhead cleaning.
(2) Deep Cleaning
Click to start printhead deep cleaning.
Use this function only if Cleaning has not improved the print quality.
(1)
(2)
(3)
(5)
(8)
(9)
(6)
(4) (7)