Mix all the ingredient together in a jar.
Cover the top of the jar with some muslin so it is tightly sealed but don't put any formal lid on the jar.
Leave for 5-7 days as you will start to see the 'scoby ' develop and float on the top. Be warned it looks gross like a floating sheet of mould.
Once you have a substantial scoby on the top pour out the kombocha making sure you leave the scoby and about 200ml of the liquid in the jar for your next batch.
ON GOING KOMBOCHA
Mix all the ingredient together in a jar, don't worry if the scoby gets all wrinkly it will sort itself out.
Cover in some muslin cloth and leave for 3-5 days or until at your preferred sweetness.
For more sweetness leave for less time (1-2 days) for a more sour fermented drink leave for longer. It depends on your preference.