Summary: A few years ago I decided to get certified as a Cicerone, the beer version of a sommelier. During my studies for the title, I learned what constitutes a “Beer Clean” glass. It’s honestly something I’d never thought of before. A clean glass is a clean glass, right? Wrong. Things like detergent residue and oils are pretty common on glassware but they can alter the aroma and flavor of your beer — and their presence means that glass isn’t really clean.
