Kathy: Oh, that. That coffee smells burnt? So barista that store water that is too hot not suitable for coffee grinder. And that the smell of coffee aroma lost early because of grinding coffee for too long, or use the coffee beans that the price be?
Jessica: Wow! How did you know so much coffee. I didn't know before.
Katie: of course, because I was drinking coffee often. So often observe customers to drink coffee and barista in stores. I have a little knowledge about coffee.