26Printing Maintenance7. Examine the printed nozzle check pattern to verify that the ink is consistent onthe printout.If indicated by the printout, clean the printhead (see “Cleaningthe Printhead” on page 26), or realign it (see “Aligning thePrinthead” on page 23).Cleaning the PrintheadIf your printed output or nozzle check pattern appears faded, streaked or scratchy,the printhead may need to be cleaned or aligned. Printhead cleaning consumesink. Avoid unnecessary cleaning.To clean the printhead in Windows:1. With the printer on, click Start, then Settings, then Printers.For Windows XP, click Start, then Control Panel, then Printers andOther Hardware, then Printers and Faxes. The Maintenance tabmay vary for Windows 2000 and Windows XP.2. Right-click the Canon S900 printer icon,then click Properties.3. Click the Maintenance tab, then clickCleaning, then click OK. The printer willclean the printhead.4. Click OK to close the window.5. After the cleaning, print a nozzle checkpattern to check the results. See“Printing a Nozzle Check Pattern” onpage 24.6. If there is no change after cleaning, check the amount of ink remaining. If anink tank is empty, replace it. See “Monitoring Ink Levels” on page 21.To clean the printhead in Mac OS:1. Make sure the printer is on.2. From an application File menu, click Page Setup.3. Click Utilities. The Canon S900 Printer Utility dialog box will appear.