Guthmund, that's quite a bold post... but in some ways I agree. I've just never been very successful at it, since most people (including myself) take their living habits quite personally and are offended at remarks to change those habits. Is someone more "adult" when they clean up after themselves, or is it more related to how that person was raised? (Is it more about maturity or living style?) Do most people really grow out of these things? And Guthmund, for you particularly, how do you manage to converse about these things without hurting the other person?
For me, I tend to get off my high horse of cleaning madness when I realize how messy I can be, too. But that doesn't help, either, as I feel that no matter who does it, the house ought to be clean. So then I get frustrated with myself in addition to the other person, which is just not good.