Once you have reached your desired level of suction, it is recommended to maintain the vacuum for around 10-15 minutes. After this time, release the pressure by pressing the release valve, which will allow air to enter the chamber and release the vacuum. Carefully remove the pump from your penis and massage to restore normal blood flow. It is important to clean the device thoroughly after each use to prevent the buildup of bacteria or other contaminants. Follow these steps consistently to safely and effectively use a traditional hand-operated cock pump.