* Exactly how to clean the printheads and print a test page varies from printer to printer - please refer to your printer's manual to find out how it works for your printer. Why use a cleaning cartridge? If the printer is idle for too long, the ink will dry up and clog the nozzles. In addition, these channels can get gradually clogged even through regular use. When clogged too much, it can affect print quality. If you clean the printheads with regular ink cartridges in the printer, the printer will simply allow the ink to flow through the channels to clear the dried ink. Instead, if you do the cleaning with 123ink cleaning cartridges, a cleaning fluid that is better at removing dried ink will flow through the channels. The result is that the colour will come out as it should, without wasting ink during cleaning. How do I store the cleaning cartridge? Wipe the cleaning cartridge with a piece of kitchen paper. The cleaning cartridge can then be covered with a piece of tape at the bottom. Keep the cartridges dry and in the dark until it is time to use them again. You can clean the printer approximately 10 times with a cleaning cartridge.