@Renea-and-Jordo0 You might try being clearer in your rules about precisely which cleaning tasks you expect guests to perform before checkout - for example washing the dishes and removing the rubbish. "Leave the cottage same as on arrival" sounds not only vague but also disingenuous, unless you expect guests to wash their linens, make the beds, and fully prepare the home for the next guests.
Plenty of hosts also have rules restricting food to the kitchen/dining area, so the crumb and stain radius is kept under control.