Considering how many perfectly intelligent adults I've known have melted, scorched, burned out their kitchen with those things, I think you're in the clear.
My own Nana destroyed several of those covers over the years, just by forgetting to take them off or putting them on again before the coils had cooled enough. It happens.
Want to make a bet that your mom does the same thing as Dazi's nana? I'll put a nickel on it....
If that happens, I refuse to say even word one!
You have to tell *us*, though, right? I promise to chuckle at her lovingly.
I was thinking about this--as people get older, they often find that others speak to them as if they're stupid.
My mother noticed this. She'd gotten very gray, and was suddenly realizing that all her coworkers were speaking to her a little more slowly and loudly. They were carefully explaining to her stuff that she knew (heck, she'd trained some of them!). So she went and colored her hair, and it stopped.
She said, "If you told those people what they were doing, they've had been so surprised. They had no idea that some automatic subroutine in their heads was telling them, 'This is a little old lady, and so she's kinda stupid.' "
Add to that the fact that your mother is not the mistress of the house anymore, and that you are the one issuing the "here's how things work" comments, and she may really be feeling talked down to by the world.
So maybe be alert to those sorts of things, and see if they're heightening your mom's sense of being treating like an idiot, or like a child.