Instructions: Place the orange or lemon rind in a blender or food processor and grind until the peel is a fine powder. Add baking soda and salt and process for a few seconds more, or until you have a fine powder. You can also use a mortar and pestle to grind the rind and salts together.

To Use:
Store the powder in a large salt shaker and shake directly onto your wet tooth brush, or keep the powder in a airtight tin and dip your moistened toothbrush into the mix. Brush thoroughly and rinse well.

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