Add grains to a large jar with 4 cups of water and all ingredients.
Place lid on top (don’t seal it)
Let it ferment 24–48 hours at room temperature. Once the dried fig is at the top of the jar, there is gas in the bottle and the first fermentation is done.
Filter the beverage, keeping the grains separate. The fruit can be kept for cooking or for making jam. You can drink the water kefir straight away (it won’t be fizzy just yet). To get the bubbles, you will need a second fermentation.
Pour the liquid into a bottle (beer-bottle type), close it and let it ferment another 24–48 hours at room temperature. If it is ready, when you open the bottle you should hear the gas.
Leave the bottle in the fridge. You can enjoy it now and keep it for months!