Final answer:
EKG technicians should store electrodes in the original, foil-lined packaging to maintain their integrity and ensure accurate ECG readings.
Step-by-step explanation:
When an EKG technician needs to store electrodes that are not in use, the recommended method is to keep them in the original, foil-lined packaging. This helps maintain the integrity of the electrodes by protecting them from environmental factors such as humidity and temperature fluctuations, which can affect their performance. Storing electrodes correctly is crucial for ensuring accurate ECG readings and the reliable function of the electrocardiograph.