When MIL was alive it would be spotless. Now it's just FIL it's clean, but not MIL standard clean! It's fine though.
My own parents' house is not spotless, but quite frankly I'd rather my parents enjoy their lives rather than spending their lives cleaning to perfection.
My DM has two rules:
- if you move it, but it back on the same dust free spot; and
- if it bothers you, I'll pass you a duster
I have a cleaner, yet my house is probably dirtier than both my FIL's and DP's houses as I have too much clutter and not enough time or willpower to make it better.
I do make sure the spare room and bathrooms are clean before someone comes to stay, but if you spot a cobweb, either remove it yourself or keep quiet! (Unless you're my DPs or FIL, in which case, point it out and take the piss).