title_body: homemade cleaner for basic drip coffee maker
upvoted_answer: Ordinary white vinegar works just fine, but the smell bothers some people. If so, use citric acid. You can either pick some up at your local grocer, or order it by the pound. I use about a tablespoon to a quart for descaling. It's gentle, has little or no odor (you may smell gasses released by the dissolved scale however), and safe unless you get it in your eyes.