Coffee helps us through the long, cold, grey winter of sloth and gluttony that is the holidays. Most coffee-making machines have one or two buttons for cleaning, but those buttons don't always do the job—or do the job well. If you've ever scrubbed out a coffee maker with soap and water only to find your coffee is still tasting weird we have the perfect tips. To prevent this from happening to you again, we're gonna give you a step-by-step guide on how to clean your Ninja Coffee Bar.  What is the Ninja Coffee Bar? For coffee lovers like us, the…