In some parts of the country the water supply is 'hard' and causes scale deposits to build up in kettles and other domestic appliances. This can cause the element to overheat, leading to failure of the element or premature operation of the safety device. In these cases it is necessary to remove the scale regularly to ensure satisfactory operation of the element for its normal life.

This descaler allows descaling to be carried out efficiently and safely, but in certain cases may alter the appearance of the inside of the kettle. The formula is completely odourless and non-toxic, but is best kept out of reach of children.