Easy to make and use. If you already have purchased ingredients for making homemade laundry detergent you'll be using two of them plus a few more products.
1 55 ounce box of Arm & Hammer Super Washing Soda
1 76 ounce box of 20 Mule Team Borax
1 48 ounce box of Kosher Salt
1 2 oz container of food grade Citric Acid (this can be found online or at local brewery or speciality beer stores. If you are unable to find it you can substitute 10-15 lemon flavored Kool-Aid (small unsweetened) envelopes per batch. Don't use another flavor because you'll color the inside of your dishwasher. 10-15 packets equal the 1-2 ounce of straight citric acid.)
1 gallon of White Vinegar
Each batch will give you 32 ounces of dishwashing detergent that you can store in an old yogurt or sour cream container.
Into a 32 ounce container add 1/2 cup borax, 1/2 cup washing soda, 1/4 cup citric acid and 1/4 cup kosher salt. Put the lid on the container and shake to mix. The detergent will clump together over time but it is still okay. Just scoop and forget the clumps. You'll use 1 tablespoon per load.
Instead of buying Jet Dry other rinse agents you can fill your "rinse aid" compartment with white vinegar instead.