Maids' house is the dirtiest

I have a saying that I tell my husband pretty frequently and I am curious if I picked this up somewhere subconsciously or if I actually came up with it on my own (which would really surprise me because I'm not creative at all). I say, "Maids' house is the dirtiest". Β In a sense this would Β mean Β that a maid spends all day cleaning and therefore the last thing she would want to do when she gets to her own personal space is clean, but I Β use it to imply that a persons' profession is the last thing they want to do once they get home (i.e. the last thing a plumber wants to do is go home and have to fix the leaky kitchen faucet, the last thing a car repairsman wants to do when he gets home from work is give the car an oil change, etc). My husband fixes computers and when mine messes up Β it takes weeks to get him to come around to fixing it so I Β always Β say, Β "Maids' house is the dirtiest". Is this something that's been around a while or am I more creative than I give myself credit for? Thanks for you help!

I haven't heard that particular phrase, but I liken it to "a mailman who takes a walk on his day off." Β Same idea.
I have not read it myself because my dial-up download is slow, but a similar sentiment, "cobbler's children are the worst shod", is reported to be old in this 1881 document.
Emmett

Yeah, the cobbler's children is what immediately occurred to me when I saw the subject line of this thread. Β And while I can't provide a citation, I have the impression that saying goes back all the way to Shakespeare's time and before.