To understand how oily coffee beans are created, you must first understand the anatomy of a coffee bean. Coffee beans are basically made up of three components - the hull that surrounds it, a blend of protein and fat and the moisture that is sealed inside the bean. The skin of the coffee bean is the one responsible for keeping the inside dry. The outer layer is composed with four extra layers to make sure that the inside of the coffee bean remains dry for a long time even during storage.
That being said coffee beans should not be oily. However, there are instances that cannot be avoided. So, where do oily coffee beans come from? The process of extracting coffee beans can either be the dry or the wet process. Whichever process is chosen the raw coffee beans that were just harvested from the fruit of a coffee tree will go through a roasting process. Whenever a coffee beaen roasted, the heat causes the hull of the bean to break thus, the berries on the inside are exposed. When this happens, the mixture of fat and protein inside the bean liquefies and causes the whole bean to be oily. Therefore, the longer you roast a coffee bean the oilier it will become. This is why coffee beans, which are very, dark due to excessive roasting are oilier and the coffee beans that have a light color have less oil in them.
What Can Oily Coffee Beans Do to Your Coffee Machine?
Dark roasted coffee beans are the ones that are usually oily as well. Even if, they taste good, be warned of what the blend can do to your coffee maker. If your coffee maker is new, make sure that you choose coffee beans that are not dark roasted or super oily. This way, you can spare yourself of the headache of taking care of problems that it could cause.
First oily coffee beans will damage your coffee maker through the stains, it will make. The stains are very difficult to remove.
How Do I Remove Stains Caused By Oily Coffee Beans?
If you've seen this warning too late and already have stains present in your coffee maker, here is what you should do. Remove the filter, and fill your coffee maker with half white vinegar and half distilled water. Run the coffee maker until the mixture fills your coffee pot. Liquid detergent won't be able to remove the oily coffee bean stains. After this, rinse, by filling the coffee maker with distilled water and letting it run again. Repeat the process until no oil is left inside.
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