Remove Corned Beef Brisket from the package, reserve the spice packet and rinse the meat thoroughly. Place the brisket in the Instant Pot on the lift-out rack (if there is a fattier side, put that side facing down).
Sprinkle the seasonings evenly on top of the brisket. Add whole garlic cloves on top of the meat. Pour in water around the edges of the Instant Pot, making sure to keep the spices on top of the brisket in place.