Ans:  You should consider replacing the ink cartridges in your printer when you notice a decline in print quality, such as faded text or streaks in printed images. Many modern printers provide low ink warnings, either through notifications on your computer or directly on the printer’s display which makes it even easier to replace the cartridge at the perfect time. And if that’s not possible, you can always rely on the approximate print yield of the cartridge and replace it when it’s overdue.