This recipe comes straight out of the latest issue of Mary Jane's Farm Magazine so I can't take credit for creating it! :) Cindy asked me to post it here, so here ya go:
Combine equal parts baking soda and borax in the detergent compartment and use white vinegar in the rinse cycle well.
That's it. Pretty simple!
If you try it, please let me know what your experience with it is. I may give it a go myself! :)