Can someone explain what the ear beer is exactly? Never heard before...
Ear beer" has to do two things - you want to dry the ear (alcohol) and you want to drop the pH (vinegar). The most common ear bacteria (Pseudomonas) doesn't do well in acidic environments.
So you don't need a lot of vinegar, since all you need to do is drop the pH, but vinegar is mostly water, so using a lot of it keeps the ear wet. I tell people to get a pint bottle of rubbing alcohol, pour out a few tablespoons and replace them with vinegar, and if you have some glycerin, a few drops of that can keep your ears from getting over dried.