NOTE:- Use of charcoal is optional. You can skip it
Boil the 2 liters of water in a big bowl and let it cool down.
Heat one charcoal piece on gas and place the heated charcoal in a small bowl.
Now place the charcoal along the bowl in a pot or glass jar.
Pour 2 drops of ghee and a pinch of hing over the heated charcoal piece.
Cover the top of the pot or glass jar with a lid for 4-5 minutes to collect the fumes inside it.
Remove tha lid and take out the charcoal after taking the fumes.
Immediately transfer this cooled down water to the pot or glass jar and cover the jar with a lid for 5 minutes.
Now add 2 tablespoon mustard (Rai) powder, 2 teaspoon salt, 1 teaspoon red chili powder, ½ teaspoon turmeric powder, and 1 pinch hing in the water. Mix well.
Cover the mouth of the jar with a muslin cloth or steel sieve.
Keep this jar in a safe place for 3 days. Stir the water of the jar twice a day.