most affordable way to clean your kettle from scale - is citric acid.It lemon inside of your teapot will shine again.But first you need to find out what scale.

Scale is usually formed on the walls and bottom of the kettle.The resulting layer of material indicates the presence of water which you consume large amounts of salts.It is because of hard water kettles are subject to the formation of this same scale.
Naturally, scale negative impact on the heating element of the kettle.Steel elements begin to heat poorly and appears repeatedly thermal resistance.As a result of tea breaks.In addition, scale and bad influences on human health.Once in the body, it can harm the kidneys and urinary system.
Of course, there are plenty of ways to get rid of the scum.For example, some boiled in a kettle various sodas, some - potato peelings.Purify kettles and using rigid metal brushes and brushes.
In stores you can also purchase a variety of chemicals, which can also be no problem to remove this attack.But who can guarantee you a total safety of such experiments?Therefore it is better to choose the most effective and harmless means - citric acid.Since the scale is formed from the alkali, it is acid can destroy it.
to clean the kettle, you will need only one packet of citric acid food.So, pour a packet of acid into the kettle.Then type in a cold water and leave for a few hours since.In no case did not boil the kettle.The chemical reaction starts and at normal room temperature.If the thickness of the layer of scale is not very big, it will disappear after a quarter of an hour.Next, pour the used water and boil the kettle with clean water is already 2 times.