Just like the DIY Dishwasher Tablets, this has been a process of trial & error. I have several recipes that all work to varying degrees, this is the recipe that I currently use.
I reuse a 5L distilled water bottle & make up a big batch - excluding the essential oils. Then as needed I refill my dishwashing liquid, hand wash, multi-purpose sprays & laundry liquid. This way I can use different essential oils as I go.