I found a recipe and made some changes on it that worked for me (as I had to work with what I found at my local grocery) and have to say that it has been good so far. It does leave the plastic ware a little dusty so I try to handwash those when possible. I also use vinegar instead of rinse aid and I haven't noticed a difference. So here is the recipe, hope you like it.
1 cup Borax
1 cup washing soda
1/2 cup salt
2 packets Lemonade flavor Koolaid (or whatever brand) OR 1/4 cup citric acid
Mix all in an airtight container and use approx. 1 Tbsp per load.
*You could also add a scoop or two of OxyClean*