Gel electrodes
Apply gel to all electrodes that will be used: AFz, C4, Fp2, T3, P4, T4. Push the end of the syringe plunger so that the gel gets squeezed out of the needle into the electrode's hole (white circle with hole on cap).
Leave both ear clips disconnected
Unplug both ear drops from the cap. Leaving them dangling would pick up frequencies from the room, which we do not want.