Place the steam rack inside the Instant Pot®. Fill the inner pot with 2 cups (500 ml) of water. Stack corn on the steam rack. Close the lid and turn the steam release handle to the Sealing Position. Select Steam and adjust the [+] or [-] to set 12 Minutes of cooking time. Steam corn.
When it is done, wait another 5 Minutes. Open the pressure cooker using Natural Release (see page 7).