Apple Cider Vinegar. Due to its antibacterial and antiseptic properties, apple cider vinegar can be used to fight vaginal odor. In fact, taking a bath with apple cider vinegar is one of the simplest ways to get rid of the bad odor. This will help fight off the toxins and bacteria that cause vaginal odor. It will also help restore the acidic quality of the vaginal flora. Mix two cups of apple cider vinegar in warm bath water.