Method one: lemon juice will not pungent smell, no harmful residue, is the best choice to remove scale.
Whether to buy lemon juice, or directly buy bottled lemon juice, is right choice.
Pour in the electric kettle 3 teaspoons lemon juice, then add a glass of water.
Let stand for half an hour. Then add a glass of water.
Close the lid after plugged in began to boil water, then, clean with clean water after the water cooling, can see the miracle.
Method 2: put two eggs shell cracking, slightly into the bottle, then in half pot of water, use a blender or spoon stirring, then boil, placed about half an hour, poured out of eggshell, reoccupy clear water is rinsed twice.
Method 3: within the new kettle, put more than half the kettle potato, fill water, potato cooked, then boil water, would not scale deposition.
But pay attention to the kettle boiled potato, wall don't scrub, otherwise you will lose the descaling effect.
To have full scale of the old kettle, boil with the above method after a second, not only the original scale will gradually fall off, and can play a role to prevent scale deposition again.