Homemade dishwasher detergent

Last night I discovered I was out of dishwasher detergent and it was getting late, so I didn't want to run out to the store.  Yet I had a dishwasher full of dirty dishes that I didn't want to leave overnight.

A quick online search led me to homemade recipes.  Here is the recipe I found:

1 cup borax
1 cup washing soda
1/2 cup citric acid
1/2 cup kosher salt

I had all the ingredients except the citric acid.  So I mixed up the other three ingredients, placed a rounded tablespoon full into the dispenser of my dishwasher, then poured a small amount of lemon juice over it.

My entire load came out sparkling clean.  And there was no odor inside the dishwasher.

I already make my own laundry detergent and use full strength vinegar as a fabric softener.  Here is that recipe:

1 cup borax
1 cup washing soda
1 bar of Fels Naptha soap, grated

Combine all.  I use one tablespoon for a very small load and 3 for a medium to large load.