How do you recognise a dirty beer glass?
Let's say, you finally got The SUB home tap, you have figured out which beer glass goes with your favourite beer and you tapped your beer yourself. But once tapped, your beer looks sad: little carbonation and a small head that dissapers completely after only a minute. A shame but easy to prevent! Because a clean beer glass can do wonders for your head.
Bubbles on the inside of your beer glass
Is the inside of your beer glass full of bubbles? It may look nice, but beer connoisseurs know what it means: this indicates a dirty glass! This is because the carbon dioxide in the beer attaches itself to the dirt in the glass.
To show you what this looks like, we sacrificed a beer. The beer glass on the right has been made greasy on purpose, creating bubbles on the side. Does your beer look like this in the pub too? Be sure to ask for a new, clean glass!
Rinsing your beer glass with water
Another trick to find out if your glass is clean before you pour or tap a beer in it: rinse it with water and see how the water pours out. Do dry spots appear on the glass when you pour? That indicates greasiness or dirt, which is where carbon dioxide will adhere.
How do you recognise a clean beer glass?
If you want to do a final check to see if your beer glass is clean, you can pay attention to the foam. If you drink from a really clean beer glass, the foam will leave rings on the glass. So to say, you can count your sips of beer on your glass. That means you have degreased and cleaned your beer glass properly.