I have been asked many times and have seen the trend online. does Baking soda and vinegar work to unclog a sink? I don't know as a plumber, I would never try it. I always say try a plunger first, if that doesn't work then you need to augur the drain. If baking soda vinegar does work for you then I'm positive a plunger would have done a better job. don't waste your baking supplies.