Select "manual" on high pressure for 12 minutes (for small), 14 minutes (for medium) and 16-18 minutes (for large). Once the timer is done let the Instant Pot come down to pressure for 10 minutes. Then, carefully force pressure. Using tongs, remove the potatoes out of the Instant Pot. Using a fork, prick open the potato, fluff with the fork tines, top, and enjoy.