Coffee is a popular drink used to wake up the body in the morning and at lunchtime.
Quite often, a standard coffee maker is used to prepare it, which requires regular cleaning.
It's not so much the coffee residue that's the problem, but the scale that remains after using tap water.
But there is a simple life hack that does not require the use of aggressive chemicals for cleaning.
Note that tap water contains quite a lot of calcium and magnesium salts, which form scale on the tank. Filters cannot cope with these minerals.
Here's how to clean your coffee maker using citric acid.