This little Rubbermaid Power Scrubber With All-Purpose Grout Head ($20, originally $30) is perfect for tiny, hard-to-reach areas, especially when targeting grout, crevices, and drains. If you've ever scrubbed any area of your home with an actual toothbrush (including metal pots, pans, or even drawer handles), you'll definitely want to amp up that power with one of these instead.