I’ve been in search of a healthy, non-toxic dishwasher tab recipe and found this one, which I ended up tweaking because I don’t want to use just any dish-washing liquid.
You will need:
1 cup baking soda
1/4 cup citric acid (found at Walmart with the canning supplies)
1 tbsp + 1 tsp Dr. Bronner’s lavender Castile liquid soap
Mix ingredients together in a bowl and put into ice cube tray compartments. The mixture will expand a little as it sets, so just remove the excess from the top and add to another compartment if you overfill them. Leave to set overnight, or at least for 4 hours. They will come out of the ice cube tray when you twist it. Store in a glass jar and keep away from moisture. Use one per load. Makes 12 tabs.