Sounds a little like r/Adhd .

I’d have a serious talk with him. Turn off the tv and put the phones away etc so he hears you. Tell him it’s important. And you’ll need to prepare for what you say next, because it needs to be short, direct, and kind.

Tell him point blank that you know he has difficulty remembering things and has since he was a kid, but he has a kid of his own now, and his habits aren’t just quirks, some are dangerous. Highlight 2 or 3 of the worst, like leaving the stove on. (Don’t mention small stuff, like socks on the floor. You’re gonna have to learn to live with the socks.)Tell him that you want to know if he is willing to get help to change those behaviors because 1) it is starting to stress your relationship and is hard for you but you want to try and be understanding bc you know he’s an adult and you’re not perfect either, but for real it’s hard, and 2) you’re afraid someday he’ll forget something that will wind up hurting the kid. People literally forget their kids in hot cars, and we’re not gonna be those people.

Then have him ask his doctors about ADD. ASAP.

Oh, and get him Tile. It’s amazing.