When a message appears on the screen or beeps are emitted, this does not indicate the need to connect the device to the mains. This can happen if the hands are dry, there is dehydration or low mineralization in the person. It is essential to maintain good hydration before and after the sessions. It is important to ensure that the electrodes are correctly connected to the cables and to the plug, with the gold part fully inserted into the device. Beeps are often indicative of a poor connection between the electrodes and the user. To solve this problem, the following tips can be followed: Use conductive gel to improve conductivity, both with electrodes and with adhesive patches. Hold the electrodes firmly at first, especially if they are cold, and loosen them once the connection is established. Adjust the intensity to the most comfortable level to allow a better passage of current. Try several days in a row with the "Universal Frequency" program to improve connectivity for users with connection difficulties. In extreme cases, it may be necessary to use it for up to a month. Make sure to maintain permanent contact between the electrodes and your hands or skin. If the beeps continue, moisten your hands with seawater or salt water to improve conductivity. Wrapping the electrodes with a wet wipe, which can reduce the amount of longitudinal waves and increase scalar transverse waves. The water must be from the sea or contain salt. Immerse an electrode in a container of salt or sea water to increase effectiveness. If after following these steps the difficulties persist, it is advisable to wash the hands or feet (as appropriate) with salt or sea water. We have a video on this point on our FAQ page.