Hi Mandi,
I agree - there are so many things! Something I obsess about is the kitchen and all the kitchen equipment - cleaning the oven, the microwave and so on. I usually remove all the china and the cutlery (even if the guest has washed everything and put it away) because invariably they’ve left some crud on a few forks or bowls. And why not? They’re on vacation, not in a housekeeping contest. 