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Herbicide
One of the most common uses for household vinegar is as an all-natural weed killer. You have to be careful when spraying it around certain plants as it may be harmful to some, but when used on those pesky hard-to-kill weeds, they will disappear in two to three days' time. Combine a gallon of white vinegar, one cup of salt, and a couple tablespoons of dish soap to get the job done.