How often should I perform print head maintenance?

• Perform print head maintenance as needed or when ink smears or drips onto your printed media even after you've cleaned the print head. Also perform print head maintenance when the colors in your printout are faint or missing even after you've cleaned the print head.
  Related tasks
  Checking for Clogged Print Head Nozzles
  Cleaning the Print Head
  Cleaning Around the Print Head