If the BMW liquid crystal car key has been soaked in water, the key should be removed from the water immediately and the surface moisture should be thoroughly wiped with a dry cloth.
Next, place the key in a ventilated and dry place to ensure that it is completely dry. If the key still does not work properly, it is recommended to send it to a professional auto repair center for repair or replacement. At the same time, you should pay attention to protect the key in the future to avoid water again.