The Beer Glass Test To Suss Out Restaurant Cleanliness - Chowhound

All those carbonation bubbles in your beer want to rise to the top of your glass, and in a clean glass, they would do exactly that. So if they're getting caught along the side, that means there's something preventing them from joining the soapy head of your beer. This could be something as well-intentioned as residue left from dish soap or the cleaning product the restaurant uses, or even a post-wash sanitizer.…