What happens when a printer is low on ink? What you can do to avoid confusion is perform periodic checks and replace cartridges when required to increase the functionality of the printer. These warning may at times be a false alarm to trick you into changing the cartridge early. Sometimes the printer issues warnings if the ink is running low to indicate the need for replacement of the cartridge. Moreover, if the ink begins to dry, the printer tends to use more ink to produce standard results. This dry ink can cause smudged printing and clog the nozzle.