The great thing about self-inking stamps is that they don't require the use of additional ink stamp pads, but they still need to be freshened up with ink every once in a while. There are two ways to go about this - the first being a small bottle of refill stamp ink where you can add on to the existing pad, or the second is to get a replacement ink cartridge. Refilling a self-inking stamp is easy! First you want to push down on the self-inking stamp until the bottom of the top piece is even with the top of the ink pad, which is set in the lower portion of the stamp. Second you want to move the lock on the side of the stamp forward to its locked position. After that you will pull out on the ink cartridge. You will hear it click into place when it is fully extended, but you'll need to keep pulling to remove it. Once the pad is out, you can dispose of it or choose to re-ink this pad. Slide the replacement ink cartridge into the slot on the stamp then move the lock switch back to its normal position, or release the button, to make the self-inking stamp is now ready for use.