Rinse the rice: Place the rice in a large strainer or colander and rinse it under cool water. The water running through the rice will usually look milky at first, but will then become clearer. It's fine if there's still some haze in the water.
Combine the ginger, rice and cooking liquid in the instant pot. If you're using any chicken (bone in recommended) add now. Don't add salt.
Close the lid immediately and cook at high pressure for 30 minutes + Natural Release in an Electric Pressure Cooker.
Open the lid carefully. The congee will look watery at this point.