Newell: The importance of regular descaling your HotCup water dispenser. Your water company should be able to tell you how hard the water is in your area, the harder your water the more regularly you will need to descale the unit. Untreated scale deposits can potentially block the internal particle filter, reducing the ability / amount of water flow into a cup. Therefore, scale can cause your HotCup water dispenser to temporary malfunction, please follow descaling guidance provided in the instruction booklet. Removable, adjustable drip tray means no worktop mess. Large front water window makes accurate filling easy, with white illumination in boil mode. Hinged lid for easy filling: perfect for those that cannot lift a heavy kettle. Variable dispense - choose from nine cup sizes – plus manual stop facility for full control. Dispenses one cup of boiling water at the touch of a button, so you only boil what you need.