You could save a pretty penny making your own dishwasher detergent.
If you prefer dishwasher tablets overthe liquid kind, take a look at these simple instructions.
Basically you combine the dry ingredients and the wet ingredients separately and then combine the two.
Head to the post linked below for the full DIY.
DIY Dishwasher Tablets Give You Clean Dishes for Only Pennies!| Suburbia Unwrapped