Proper contact between the electrodes and the skin is crucial for accurate electrophysiological signal acquisition. Follow these steps to optimize contact quality:

1. Press firmly on the electrode patch to eliminate air bubbles between the electrodes and the skin. Do this for each electrode, even if bubbles are not visible.

2. Ensure a secure but comfortable fit—the device should not be too tight against the skin.

3. Prepare the skin properly:

• Remove any makeup, lotion, or other artificial substances from the application area.

• Keep the skin dry before applying the electrodes.