Be honest: When is the last time you cleaned the mattress? If you can't recall, it's time for a refresh in order to eliminate dust mites and deodorize your sleeping quarters. Remove the mattress cover, and use a vacuum attachment to clear away crumbs, pet hair, and more from the cushion top. Then sprinkle the surface with baking soda to deodorize. Let that sit for at least a couple hours before vacuuming clean.