A traditional method uses sodium bicarbonate. Pour a tablespoon of baking powder in the drain hole, then 2-4 tablespoons of vinegar and let the mixture act. After 30-40 minutes pour two liters of boiling water in the drain. Another solution is made of 2 liters of boiling water and 5 tablespoons of salt. The hot solution is poured directly in the drain and will help to remove fat deposits
