Here is a recipe for cleaning and softening fabric. I use a 2L clean milk bottle to which I add 1L white vinegar and 1L of boiled cold water. Mix together and let stand for a week.
Cindy from Matamata comments: “The recipe entered by Lorraine of Hamilton to make white vinegar is incorrect and should be deleted. For a start you have to use sterilised glass or metal container. It does not work in a plastic container and also the fermentation stage is longer than a week. Check out: recipes.howstuffworks.com/how-vinegar-works2.htm”.