I checked out the label on the ecover stuff-it was basically sodium bicarbonate and other bicarbonate stuff, some kinds of sugars-so i figured I'd try to make my own.
I used about
3 T. baking soda and
1 T. arm & hammer washing soda laundry booster (yellow box) and
1 T. borax.
My dishes came out nice and shiny and clean! And no funky smell as they washed!
I was surprised at how little water the machine uses and may even be able to justify it's use!
i thought of using vinegar but decided not too-though i noticed one of the expensive spot treatment liquids at the store was primarily vinegar-so maybe in the 2nd wash cup(?)
yes, some folks here have said vinegar etched the inside of their dishwasher.