3. Treat sinus infections. 
Use a tablespoon of hydrogen peroxide in one cup of chlorine-free water as a nasal spray. Adjust the amount of peroxide depending on the severity of the infection.
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3. Treat sinus infections. Use a tablespoon of hydrogen peroxide in one cup of chlorine-free water as a nasal spray. Adjust the amount of peroxide depending on the severity of the infection.
