Dry, very thick mucus should be dissolved by a mild saline solution in order to reach the device's full potential. After using the solution, wait a few minutes, wipe excess discharge with a tissue, then reuse the nasal aspirator as directed. The device turns itself off automatically after 13 minutes of continuous use but it can be restarted. In case of overuse or if insufficient ventilation is provided, the thermal switch switches off the device and will prevent reuse for approx. 45 minutes to prevent overheating. Power cord operated adjustable suction power: Before using it, connect the power cord to the device, then to the 110 V socket. We supplied the Nosiboo Pro with a control button. The suction power can be adjusted to match the age of the child and the thickness of the mucus. And as always, we care! The maximum suction power was determined to clear the noses efficiently while being gentle.