Like a lot of people I use vinegar for several household cleaning jobs. I don't trust it enough for this one and have a good store of other products. However, if worse comes to worse vinegar is easy to make from fruit. One of our daughters makes her own ACV. Basically letting crushed up apples sit in apothecary jars until fermentation reaches the vinegar stage. There are plenty of online instructions. I don't see those of us who have prepared as needing this, but with supply chain disruptions we may all need to resurrect some of these things our grandparents did in their day to day life.
Way ahead here on the vinegar. And will probably get more and baking soda tomorrow.
And on the “credulous” question above, our household is in line with Dr Tenpenny’s research.