Why do I get an exclamation mark on the app?

This means the signal quality of the headband was poor the previous night, and the data collected may not be relevant. To prevent this from happening again, please ensure:

1. Your headband is worn and adjusted correctly.
2. Your face and hair are clean, and they're free of lotions or creams as much as possible.
3. You clean your headband and its sensors every 10 days or so with disinfectant.

After you complete the checks above, you can verify the quality of your signal with LIVE EEG.