How to make and use ajwain potli to cure cold on a 4 and half months old baby?

A. Hello, roast 2 cloves of garlic and 1 tsp of ajwain on a pan. When it starts turning black and aroma starts coming switch off the flame. Make a potli of this in a muslin cloth. Keep it by the side of ur baby. When you smoky flames inhaled by the baby, it will cure cough and cold. When warm u can even rub on the chest and back of the baby.