Sarah's Cleaning Scrub

1-3/4 cups baking soda
1/2 cup liquid castile soap, such as Dr Bronner's Peppermint
1/2 cup water
3 Tablespoons vinegar
1 drop essential oil of your choice, optional
  (definitely not needed if using Dr Bronner's Peppermint)

Combine in a bowl until smooth.

Store in a clean bottle with flip top cap, such as a ketchup bottle.

Shake well before each use.