I had to unplug the sink the other day, there was far too much hair and gunk down there.
To save electricity, I unplug my computer when I am not at home.
Hopefully Alex would hear it and unplug his computer.
When cleaning up, unplug the mixer from the wall outlet first and then unplug the cord from the mixer's housing.
When done, remove the food from the grill, turn the switch off, and unplug the grill.
Unplug the unit and take other safety precautions to avoid injury.