Don't get involved, it's really none of your business.
Our house isn't very clean. I work my ass off in my day job, put in extra hours in the evenings sometimes weekends, when I'm not working I am spending quality time with my young daughter. I also have a lazy husband - much like Velvetee's fella, who does sweet FA and on rare occasions of trying just makes it worse. There are not enough hours in the day for me to make my house look like a spotless showhome.
Parts of my house are falling to bits but through lack of money and time so they'll have to stay like that for now. I do what I can in the time I have and that's all I can do. I've seen family sniffing about passing judgement. I've had offensive comments off my husband's grandmother whom I would have shot back an earful if she wasn't so old and bonkers (directed at me, not my other half - glad to see equality in action!). Other family have made 'jokes' also. It's downright offensive.
Not everyone has the time to make their houses clean, it's not a top priority for most people. And if all I had to occupy my time was cleaning my house so other people didn't stick their noses up at me, it would be a dull existence indeed.