We had to shut off her oven and stove because she almost burned the house down after leaving food in oven at 500 degrees. Just yesterday, she ignited yet another fire in the microwave by putting food in for 45 minutes then falling asleep. She is deaf and has no sense of smell and thus cannot tell if something is burning or an alarm has gone off. We need something safe that can shut off automatically and hopefully keep her and our home safe. Help!