Keurig coffee machines are a super convenient way to brew your coffee in the morning or whenever you need your caffeine fix. Some of the “smart” Keurigs even let you brew a cup via an app, so you don’t have to leave your bed until you know a freshly brewed cup of coffee is waiting for you. Sadly, for as much as Keurigs can do for us, a majority of us likely aren’t giving them the attention they need — in the cleaning department.