Use baking soda/vinegar to clean dishes. I have seen tips on using baking soda as a substitute for dish washing liquid or powder but they usually involved adding some other cleaning element as well, and I have seen the use of vinegar for many cleaning uses but I have not yet seen these two in combination.
I had dish powder left over still to use, but I had become frustrated with finding my dishes not clean and the rather expensive dish powder clumped in the receptacle.