I would use about 1 lb. of baking soda to 1 gallon of vinegar. Don't put it all in at once. 1 to 2 teaspoons at a time. You'll need to experiment a bit. When you add the baking soda you will get a bunch of bubbles, like a shaken bottle of Champagne. So be careful, in joy your self. It ain't nothing but a party.