Coffee is an organic and perishable product. Coffee deteriorates very quickly when exposed to air and heat. The longer the coffee is left in the coffee mill, the longer the contact time between the coffee and the oxygen and heat source will be, and the coffee will also become difficult to swallow. If you do not clean it regularly, most coffee machines have a small amount of coffee powder left in the interior, which means that the coffee beans you grind each time are not 100% fresh.
The way the coffee grinder grinds coffee beans may be different from what you think. You can control the thickness of the powder by adjusting the button on the grinder, but the ground coffee powder will never be uniform. All coffee powders are different in size. To put it simply, most of the coffee powder ground by a high-quality coffee grinder can meet our expectations, and only a small part is too coarse or too fine coffee powder.
Among them, ultra-fine coffee powder is the main reason why you must clean the grinder. Since these coffee powders are very, very small, they will deteriorate faster when exposed to oxygen and heat. At the same time, these fine powders will mix with oily substances and stick to the grinder. Over time, the coffee powder sticking to the grinder will form a shell, which will give the ground coffee powder a roasted peanut flavor. All coffee ground from unwashed coffee mills has this taste. As long as you clean the grinder regularly, you can completely get rid of this boring taste!
