2 T. lemon or orange rind, dried
1/4 C. baking soda
2 tsp. salt

Place 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.

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