I stay in Hotels and Motels all the time and always wondered about this. I quit using regular glasses and coffee cups only paper. Coffee Pots I guess are cleaned the same way so I will never make another pot of coffee or tea in the rooms anymore.
How gross and these hotels are not the lower class motels or hotels. It makes you wonder about the beds and how clean they are especially the bed spread and sheets and pillows. This makes me not want to travel but I am forced because of my job.