I use the hotel coffee maker just about every time I travel...but I might start running to a coffee shop from here on out.
A Reddit user has shared a photo of a hotel coffee maker that's COVERED in mold. I'm not talking about a little bit of mold...this is a SCIENCE EXPERIMENT.
As he put it, quote, "You know it took weeks, if not months, for this ecosystem to develop." So . . . um . . . ALWAYS inspect the hotel room coffee maker before you use it.