Combine baking soda, washing soda, and Oxi-Clean together in a gallon size container with a tight lid.
Add salt on top and drop in essential oils, if using, in the salt for better distribution and absorption.
Put lid on container and shake until all ingredients look well combined.
To use, add 1 Tablespoon per load for front-loaders or 2 Tablespoons per load for top-loaders, following your washer's directions for powder detergent.
Wash as normal!
