There is one notable caveat to our "foam on the side of your glass means it's clean" findings. If you see bubbles clinging to the side of the glass BELOW the surface of the beer, there’s a good chance the opposite is true. Scratches in a glass - but also things like lint, food particles or other specks of grime - can give those bubbles that are too small to escape to the top a place to hide and not get crushed. Sometimes etchings are made in a beer glass to promote the continued production of bubbles, and that can be a good thing. The bubbles usually look pretty uniform in these cases, and rise up to the head. But if you see bubbles randomly dancing around a spot on the side of your glass, it might not be as clean as it should be.
There is one notable caveat to our "foam on the side of your glass means it's clean" findings.
If you see bubbles clinging to the side of the glass BELOW the surface of the beer, there’s a good chance the opposite is true. Scratches in a glass - but also things like lint, food particles or other specks of grime - can give those bubbles that are too small to escape to the top a place to hide and not get crushed.
Sometimes etchings are made in a beer glass to promote the continued production of bubbles, and that can be a good thing. The bubbles usually look pretty uniform in these cases, and rise up to the head.
But if you see bubbles randomly dancing around a spot on the side of your glass, it might not be as clean as it should be.
Fascinating!!
Cheers, Jane. May all your beers be cold and all your beer glasses clean.
*GBH News Matt Daley appreciate your videos Listening 🌟 from Mass USA TYVM 💙 Matt*
Thanks, Matt. We appreciate you!
I learned in college if you stick your finger in the glass, the foam dissipates - so if you poured too hard, it was a way to keep it from overflowing.
How do u get the glass beer clean