My stove isn't on fire. I know very well how to put out a fire

we've created so many I'm surprised I haven't received a special bill from the fire marshal
But I can't get this one family to turn off their stove. They always leave the kettle on as the old nursery rhyme used to say.
Also, if I have a person with a kitchen job HOW do I get them to do dishes??? Or is it like real life and they don't like doing it when they cook themselves?!
I tried finding the answers to this but all I could find were questions about stove fires and nothing about dishes or actually turning off the stove.
So sorry if this is a dup. I did a search but in my defense I have the flu right now and may not be at top form.
TIA. Shelly