I use the Keurig machine at work for hot water for my tea, but I always run it through a cycle before letting the water touch my tea bag because there’s always a few coffee granules that need to be rinsed out first.
I ran the cycle three times today and even took it apart to clean it because there were so many coffee granules that kept appearing in my mug. I thought I got them all, but I just took a swig of my tea and am now wishing I could claw out my tongue because apparently a loose granule was in my mug so now all I can taste is coffee. I’m so sad – all that effort, wasted!