Get a pack of two from Amazon for $11.99 (also available in a five-pack). Promising review: "Didn’t think it would work, but it DID with no scrubbing!! My husband didn’t think our grout was originally ...

This can easily wipe away that grease, oil, dirt, ink, makeup, and food so you don't spend the next hour trying to scrub it with baking soda. This won't clean your grout but it'll make it look ...