When used together, baking soda and vinegar will neutralize each other, effectively canceling out the benefits of low pH for vinegar and high pH for baking soda, which is precisely what makes them tick and remove stains, bacteria, pests, fungus, is by creating an environment mot suitable for them. If cleaning has worked before by combining the two then I suspect what’s happening is the stain or mess? Was not that bad in the first place meaning water would’ve cleaned it up along with the abrasion of baking soda, so essentially they still worked in a different way.
