Are you supposed to rinse corned beef before cooking?
Regarding this, do you use the liquid in corned beef package?
Place the brined corned beef in a large pot or Dutch oven along with the liquid and spices that accompanied it in the package. Pour in enough water to cover the beef, then bring the water to a boil on the stovetop. Reduce the heat to a simmer, and cover the pot.
Moreover, do you have to soak corned beef overnight?
Soaking the corned beef overnight or even for a few hours will help leech out that strong salty reflection, and bring the flavor of the meat back to the forefront. Soak the meat in water, changing every 2 – 3 hours. Put the meat into a re-sealable bag and soak overnight changing the water as often as you remember.
You can overcook anything. The best way to cook corned beef is to steam it (not boil it) and the perfect internal temperature is 200 - 205 F where it is still juicy, tender, and easy to slice (you always slice across the grain, right?)