Gargling salt water, baking soda in water, or diluted apple cider vinegar will help you kill unwanted bacteria. You can gargle with salt water alone by dissolving ½ a teaspoon of salt in one large glass of warm water. Alternatively, you can add 1/8 teaspoon of salt to ¼ teaspoon baking powder and mix it into one cup of warm water. For apple cider vinegar, add 1-2 tablespoons to one cup of water.

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