Remove the wrapper from the can and place in a pot on it's side.
Cover with water, having at least 2 inches of water above the can.
Bring the water to a boil, then reduce heat to keep it boiling but not a rolling boil.
Boil for 3 hours, add hot water when the water level drops.
Once 3 hours have passed, turn of heat and let cool overnight. Do not open the can while hot, it can explode.