Image credit: Shutterstock A few years ago I decided to get certified as a Cicerone —the beer version of a sommelier. During my studies, I learned what constitutes a “ Beer Clean ” glass. It was honestly something I’d never considered before. A clean glass is a clean glass, right? Wrong. Things like detergent residue and lingering oils are pretty common on glassware, and they can alter the aroma and flavor of your beer—and their presence means that glass isn’t really clean. The good news is, there’s a really easy way to tell if that glass you’re drinking out of isn’t “beer clean.” This hack comes with a downside: If you frequent dive bars or like to drink a beer or two at your average restaurant or airport bar, I’d recommend not reading any further. Once you know how to detect a dirty glass you won’t be able to avoid doing so, and I can tell you from personal experience that dirty glasses are pretty much everywhere. Ok, you’re sure you want to know this? Really sure? Alright, I warned you. You can tell a beer glass isn’t “beer clean” if you pour beer into it and bubbles cling to the sides. It will looks something like this photo below: Screenshot: YouTube The head on your beer will also dissipate more rapidly in a glass that isn’t beer clean, and/or the foam won’t cling to the side of the glass as you start to drink: This YouTube video does […]