I replace dishwasher powder with bi-carb- it actually does work just as well- and white vinegar for the rinse aid.
Wow! Really? Even for pots and pans? Dishwashing powder is sooo expensive, I'm going to try this one.

I have tried the vinegar and bicarb thing before but I gave it up because I found it more time consuming. I found I had to do a rinse wipe down afterwards (sometimes twice) so it effectively meant I was doubling my work. I was so inspired by Spotless and Speed Cleaning and bought all the natural ingredients she recommended but I wasn't happy with the extra work so I'm back to bleach and Spray and Wipe I'm afraid.