When my mother-in-law had dementia, she left eggs on the stove until they exploded. We got a device that will turn off the stove if there is no motion in the room after a certain period of time. My husband now has dementia, and I understand your frustration. You think you have everything in order, and then the eggs explode and you have to deal with a whole new set of issues. You sound like a kind husband. It’s a really hard job.
This is a good place to let off steam. 😊