Im just going to generalize by saying, Everything.
I have to double check almost everything he does or says he does.
Like if I ask him to re-fill DS wipes container in the nappy bag. If I don't check, it's empty and I'm out without wipes.
Or cream on DS bum after a change.
Or using the right cloth to clean mirrors.
I spend more time checking him than I do DS! Lol