I do the same thing. I work 4 days a week, to spend one weekday (as well as the weekend, of course) with the kids.

Still, my wife regularly points out that I again forgot to do the laundry on that day off, and most of the time she still cooks that day. I want to, but still haven't fully picked up my share of the household work. And the worst part is that she still has to point this out to me.

I do better than most men and am still falling short.