Wash and then pierce potatoes with a fork all the way around each potato. Rub salt on the outside of the skins
Put a trivet inside your pressure cooker with 1.5 c. water, make sure water doesn't touch trivet itself (don't want potatoes touching water)
Place 4-5 potatoes inside your pressure cooker.
Close lid and steam valve and set to high pressure for 15 minutes. (note, time will vary according to how large your potatoes are but I have found for medium size baking potatoes 15 minutes gets the middle done and insides tender).
Allow to naturally release pressure for at least 5 minutes, release rest of pressure. Use a fork to pierce to ensure middle of potato is done. If not, put back and set for additional 5 minutes if needed. Enjoy!