The 9 Most Disgusting Places in Your Home
Surprise: Toilets and trash cans don't make the list.
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Washing the inside of this workhorse every 40 to 80 brews won't just make your coffee taste better—it'll also eliminate the bacteria and mold that NSF says tends to grow there because of the dark, damp environment. Fill the tank (or reservoir, as it's called on some models) with about four cups of vinegar and let it stand for 30 minutes. Run a cycle with the vinegar, followed by two or three cycles with water until the vinegar smell fades.