Hydrogen peroxide is one of my favs. It is also an excellent teeth whitener and much cheaper than teeth whitening products. It is safe to use.
Mix equal amounts hydrogen peroxide with water, such as 1/2 cup to 1/2 cup.
Swish this mixture around your mouth for about 30 seconds to 1 minute.
Stop and spit out the solution if it's hurting your mouth and try not to swallow any of the mixture.
https://www.healthline.com/health/hydrog...hitening#2
Mix equal amounts hydrogen peroxide with water, such as 1/2 cup to 1/2 cup.
Swish this mixture around your mouth for about 30 seconds to 1 minute.
Stop and spit out the solution if it's hurting your mouth and try not to swallow any of the mixture.
https://www.healthline.com/health/hydrog...hitening#2
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