1 You will need to mix your ingredients in a large container, that will hold at least one gallon of fluid. You can do this in a large bucket or pot, and once the fabric softener is mixed, you can transfer it to the container you want to store it.
2 Start by adding 1 cup of baking soda to your large bucket or container. Then add 1 cup of water to the baking soda. You do not have to stir to dissolve the baking soda, as the next step will do that for you.
3 Now, slowly pour in 6 cups of distilled white vinegar. This will cause a chemical reaction with the baking soda, and the mixture will start to fizz. (This is why you need to mix it in a large container.) Let the mixture fizz for a few minutes to help dissolve the baking soda.
4 Now add 6 more cups of water to the mixture. This will stop the fizzing process. Stir to properly mix all ingredients together.
5 If you want to add essential oil, you will now add your choice of oil. 10-15 drops of pure essential oil is generally sufficient enough to give the fabric softener a pleasant scent.
6 Pour your fabric softener into your choice of container. If you have left over fabric softener or laundry soap bottles, those will work excellent for storage of your new fabric softener. Just make sure they are properly cleansed before you add your new mix.
7 When you are ready to do laundry, add 1 cup of your fabric softener to the final rinse of your laundry, just as you would a store bought fabric softener.