It is very rare for a device to be defective or become defective. We occasionally get calls or emails from new customers that are using the device for the first time that state that the voltage does not go up as high as they set it at, or that it dropped down a bit in voltage after going to the set voltage. (for example, they set the voltage at 35, and it goes to 35 temporarily and then drops to 29V. Or it never even gets to 35 and just stops at 29). When this happens, it is most likely that the Current Limitation feature has been activated (see page 18 of the manual). This happens when a person’s body electrical resistance is very low. The voltage will only increase up to a certain point until the body resistance increases, which will happen with subsequent treatments as a person becomes “drier”. As your resistance increases, then higher voltages can be reached. If a user experience this, it is important to remember that the device saves the settings as it was last used if it is in a profile setting, so it is recommended that the user manually increase the voltage to a higher point than it was last used at to make sure the device can “try” to go higher on the next session. For example, using the example above, if the device stopped at 29V, and the user previously set it at 35V, then the next time the device is turned on, it will only go to 29V unless the user again increases it higher to 30 or more.