1. Generally, it only takes about 5 minutes to cook corn in a pressure cooker. When cooking the pressure cooker, be sure to only put water to cover half of the corn. Also, cover the valve and change to medium heat.

2. Since sweet corn and sticky corn mature at different times, if you want to cook them in the same pot, cook the sweet corn for a period of time first, then add the sticky corn and continue cooking until mature.