Despite the fact that there is a brand of eco-friendly dishwasher detergent that really works well for me, I went on the hunt for a homemade recipe.
This is what I found:
Dishwasher Detergent
1 cup borax
1 cup washing soda
1/2 cup citric acid
1/2 cup kosher salt
I have yet to make this since I need to order the citric acid. While I am looking forward to trying this since it seems so cheap and easy to make, I am also a little concerned about how harsh the washing soda and citric acid might be on my dishes.
Once have made and tested my first batch, I will repost with some feedback.
Also - remember that vinegar works extremely well as a drying agent. For years I have been using vinegar instead of the commercially sold chemical versions and my dishes are always water spot free.