Photograph by Ryan Liebe for Emily Henderson Design.

From the grease in your oven (thanks, late-night pizzas) to the bath bomb buildup in your tub to the year’s worth of dust bunnies under your bed, housekeepers have seen it all. And that’s why they have some pretty genius tips for dealing with the worst of it—and more important—ensuring your home never gets so bad you actually have to call in a pro.