Coffee beans are basically made up of three components:
- The hull surrounding them.
- A blend of protein and fat.
- The moisture that is sealed inside the bean.
The process of extracting coffee beans can be either dry or wet. Whichever method is chosen, the raw coffee beans just harvested from a coffee tree's fruit will go through a roasting process. Whenever a coffee bean is roasted, the heat causes the hull of the bean to break; thus, the berries on the inside are exposed. When this happens, the bean's mixture of fat and protein softens 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 with a light color have less oil.
What Can Oily Coffee Beans Do to Your Coffee Machine?
Dark roasted coffee beans are the ones that are usually oily. 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 you choose coffee beans that are not dark roasted or super oily.
First, oily coffee beans will damage your coffee maker through the stains they will make. The stains are very difficult to remove.
You might damage your machine if you try to scrub them off or use a strong liquid or detergent. If you leave the stains, they will eventually emit an unpleasant odor affecting the coffee flavor. Oily beans are not a necessity for a great coffee. The secret of great-tasting coffee is in the grind, not the beans.
How To Remove Stains Caused By Oily Coffee Beans?
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.