He read the coffee shop’s employee instructions for washing their hands. This was in the restroom. The final step of their hygiene guidance was to use a paper towel to turn off the water. These were part of the instructions posted on an air dryer. The restroom had no paper towels.
It struck him as funny that they stopped with turning off the water using a paper towel which wasn’t available and didn’t mention opening the door. With what were the employees to seize the handle? Apparently, the door handle was safe, where the water handle was not.