When it prints, there's horizontal lines from top to bottom 1/16" apart

SOURCE: #5 black ink cartridge skips through the middle occasionally

Replacing the print head
The print head may need replacing if, after all print head and ink tank troubleshooting has been performed:

• The nozzle test appears broken or to have horizontal white streaks.
  
• One or more of the colors is missing from the Nozzle Test.
  
• The colors are incorrect on the Nozzle Test.
  
• A print head error is indicated on the unit.
  
• The printer powers off when the print head is installed.

SOURCE: Light strips horizontally across page (blurred and faded stripes)

Ink cartridge has dried out.

SOURCE: streaky printing from canon pixma MP600

There is usually a maintenance button or similar in the "printer properties" dialog box to run a cleaning cycle."Right click" on your printer, select "properties", and you should see something. Try that.
Also, are these Original cartridges or compatibles / refills? Non originals can often cause image quality problems

SOURCE: Canon MP980 prints horizontal pink lines across

try to change the color ink. horizontal banding (the pink or other color lines appearing means horizontal banding) when there is a problem on one of the heating element of the printer head. since almost all canon printers have head built in the inks, replacing the faulty ink will solve the problem. if not then the controller of printhead on the carriage and mainboard needs to be checked.