I see the message Remove and Shake White Ink Cartridge Once a Week. Do I need to shake it immediately?

• Once you've installed a white ink cartridge, it needs to be shaken weekly to maintain image quality. You can continue to print if you see this message, but you should remove the cartridge and shake it as soon as possible. If a month passes without the cartridge having been shaken, you see a warning message and you will not be able to print. If this happens, shake the white ink cartridge to clear the error and resume printing. See Shaking the Installed White Ink Cartridge for more information.