TEA EGG MARINADE: In a pot, add water, tea bags, cinnamon stick, star anise, soy sauce, brown sugar, and sea salt. Boil on high heat.
With the hard boiled eggs, gently tap the outside of the egg shells with the back of a spoon to crack the shell evenly.
In a slow cooker, arrange the eggs in the pot and add the boiling tea egg marinade. Set the slow cooker on high for about 1-2 hours. Let the eggs soak in the tea mixture for another 2 hours or overnight (for stronger tasting tea eggs) on low. Put eggs in a container and store in the refrigerator.