Does milk damage a pilsner glass and how does it happen?

Question

I have heard that drinking milk from a beer stein or pilsner glass will ruin it for drinking beer. It's supposed to make the foam flat or something.

Is this true, or is it a tale?

How does milk ruin the stein/glass?

Wouldn't thoroughly cleaning mlk out of the stein/glass keep it suitable for beer drinking?

Thank you for any facts. (I already have the stories)

Answer 1

If your pilsner glasses are kept super clean after drinking milk out of them they will be fine.

Bad cleaning can leave a layer of milkfat that will make the beer not stick to the sides while drinking - a sign of fresh beer in a clean glass also has a 'head' the entire time while drinkin it.

In a dirty glass, the beer will not stick to the sides, will not maintain a good head and will go flat faster.

The glass may look clean but even a tiny amount of fat - or oil for that matter from lipsticks and makeup can do the same thing. This is a big problem in bars where the glasses are not scrupulously cleaned with HOT water and sanitizer.

I would probably save my pilsners at home or the bar for beer only and stick to a regular glass for drinking milk.