The Ion cleanse belongs to the consume product. Normally, it can be used for 40-60 times (if the water hardness is appropriate and a little salt.), but when it’s always Zero on V and A place of the display, that means the Ion heads need to be changed. The too hard water, too more salt, long-time dipping will shorten the life of the Ion heads. The Ion cleanse will be consumed constantly during using. And the impurity on it will become more and more. Its function will be weakened. It’s necessary to change the Ion cleanse to keep the good function. To prolong the usage life and keep the sanitation (avoid of the interactive inflection). Sterilize, clean and dry the device after using every time. For the good effects, please change our special Ion cleanse. If you use other brand, it’s easy to broken the mini-computer electrode plate and damage the machine.