Just this week he started the dishwasher and then decided he didn't want to run it yet. Instead of pressing and holding the cancel button he forced the door open while it was running. He was screaming, "how do you stop this?" but he didn't wait for an answer, he was already pulling on the door.
He takes hot pans out of the oven and places them on the counter, he leaves dish towels on the top of the stove, he chops food directly on the counter, not on a cutting board.
He left the back door open, not just unlocked but open twice overnight.
When I say anything to him he says, "nag, nag, nag".
He's highly educated and he hasn't always been so careless.
What should I do?