Unwanted horizontal white lines or stripes appear
Problems with print quality, especially horizontal white lines in your document, may mean a nozzle on the print head is clogged or your ink cartridge is running out of ink. There are two ways you can clear up the problem.
mCleaning the print head is the faster method. It forces a nozzle cleaning as part of a print job. In other words, you can tell the printer to clean the print head before it starts printing the next document.
mPrinting a test page also cleans the print head. It gives you a test pattern you can evaluate, but it takes a bit longer.
IMPORTANT Cleaning the print head consumes a small amount of ink. If you repeat the procedure unnecessarily, you reduce the life of your cartridge.
Explanations of both procedures follow.