If your kitchen cabinets are not flush with the ceiling it can collect dust, grime, and grease. Like me, I have a cookie jar collection on top of mine. It is a real pain to scrub every few months because it is hard to reach and full of the sticky dust. Here is a hack: line the tops with parchment paper. It will collect any airborne dust before it sticks. These removable liners can be replace as needed without any scrubbing! It save hours of cleaning time!