This keeps on happening until most of the hydrogen ions are removed.
You can buy acid test kits at a beer- and wine-making supply shop for only a few dollars but these are designed to test the acidity of wine, and generally will not measure an acidity of more than 1%.
Removing the water from acetic acid lowers its melting point by 0.
According to Le Chatelier's Principle, that will tip the position of the equilibrium even further to the left.
Continue until pH of 7 is reached then switch to about 1 mL increments.
In fermented drinks such as water kefir or kombucha, or in fermented fruits, there is an additional presence of yeast, either added to the mixture for fermentation, present in the material being fermented, or present in the culture.