To sprout beans, firstly rinse it in water 2-3 times.
In a deep dish or bowl or take a bottle, add washed beans and then add water till 1/4 level.
Keep beans soaked in water for around 12 hrs. Then drain water.
Take a very clean wet cheesecloth or any soft cotton cloth,transfer soaked beans to it. Then keep that cloth tightly wrapped in another container, in a cool and dark place. I usually keep it in hot case/casseroles especially in winters that provide enough warmth for sprouts to grow.
It usually takes -2 days for full sprouting. In between you can shuffle the beans so that it gets air and some space for the growing sprouts. Always keep the container at a warm place.
Once you get sprouts, transfer to an air-tight container. Line it with paper kitchen towel/napkin to keep away extra moisture.