Homemade Dish Detergent for Dishwashers

I have had this recipe for a while, but I have not used it in a while (we don't use a dishwasher).

1 cup Washing Soda
1 cup Borax

1/4 cup Kosher Salt

I added the salt because I had researched homemade detergents and several people suggested the salt helps get the dishes clean. I put vinegar in the rinse cycle to help with the hard water we had.