How does the child lock feature work and how do I enable or disable it?

The child lock can be enabled or disabled through the system settings menu after the UVC LED Sterilizer setting step. With child lock enabled, you need to press the hot or lukewarm button first and then press the dispense button to dispense hot or lukewarm water. To toggle the setting, press the increase button to disable and the decrease button to enable the child lock. (Page 10)