First, mix dry ingredients together then slowly add in a little lemon juice at a time. Incorporate juice into dry mixture well before adding more juice.
Juice will cause a fizz which is why you need to add it slowly steady and a little at a time then mix it in well.
Next, add in your essential oil drops and stir in well.
Then pack mixture into ice cube tray tightly with fingers. Push down hard to pack the mixture into each cube.
Note: There may be extra that does not fit into this one ice cube tray. Consider using a second tray or just using the crumbles as “powdered” detergent in your next couple of loads in the dishwasher.
Let cubes sit for at least 8 hours to dry before using. Best results come from leaving tablets to set overnight.
After tablets are fully dry, pop out the cubes and store in an air tight container such as a gallon glass jar with a lid.