I ran out of dishwasher detergent.
I HATE buying dishwasher detergent.
I hate it (and wasting water) enough that I give Mark grief about running the dishwasher when it's not completely full of dishes crammed into every possible space.
I did not want to go the store having just left $100 there for what I had planned to be 7-10 days worth of meals.
So I looked up a recipe for dishwasher detergent on the internet and was amazed at how simple and inexpensive it was.
Use equal parts Borax and Baking Soda in whatever quantity you like or have at hand.
This recipe works just fine and I don't feel the least bit deprived at not having a fancy bottle of Cascade. I love the simplicity of the homemade stuff.
I stored my new dishwasher detergent in an old Good Seasons Italian Dressing (from the mix) bottle that was sitting around in the cabinet but I'm still brainstorming on what a better container would be. There might be a blog post about that when I figure it out!
Meanwhile, you might give this a try.