Place the nozzle side of the cartridge into a bowl filled with warm water.

Do not completely submerge the cartridge inside the water, just half of it.

Wait for 5-10 mins or until you see ink leaking out into the water.

Once you see ink leaking out, remove the cartridge from the water carefully.

It may be a good idea to keep a bit of paper towel or a rag handy to catch any drips from the ink cart.