The litter box. If you are a cat owner—especially if you have cats who seem to poop half their body weight daily, such as mine do—the foul rectangle inspires a particular sense of unease. Cleaning it is the task every cat owner dreads. This need not be the case.
I don’t generally think to clean my oven unless I need to pass a move-out inspection or bits of burnt food lurking within it start setting off my smoke alarm. But the longer you put it off, the grosser your oven gets, so go ahead and tackle it right now.