The first very successful all natural AND cost effective non-toxic product replacement I have made is dishwasher detergent. I have read many “recipes” and I combined those to make a ratio that worked for me:
1 cup Borax
1 cup Washing Soda
1/4 cup citric acid (add some more if your dishes come out cloudy)
1/2 cup sea salt
Add 1 to 1 1/2 tbsp for a load of dishes.