1 cup Borax
1 cup of Washing Soda
Mix and put in a air tight container with a lid. Use 1 tbsp per load.
You can find both these at most Abertson's, but I found mine at Winco. They usually are about $2.00 each. Remember, you only need 1 cup of each so this stuff goes forever. You can also use this to make your own laundry soap (look in previous post). This stuff is great. Works better than store bought kinds and doesnt have any harsh smells. Nothing at all to be exact.