How to Use Baking Soda in Laundry - The Spruce
By adding 1/2 cup of baking soda to each laundry load, detergents can work more effectively and reduce bacteria. For heavy odor problems like underarm perspiration or environmental odors like cigarette smoke, use baking soda and water as a pre-soak. Dissolve 1 cup or 2 cups of baking soda in some warm water.
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