@ShadowJonathan Long ago, I literally screamed at a colleague who was trying to refill copier toner by prying open a toner container and POURING it into the receptacle while the stuff got everywhere, and IGNORING THE INSTRUCTIONS that clearly showed how you were supposed to attach the container to the receptacle...

Toner was everywhere. It was all over him. He had to leave because he was too filthy. He couldn't explain why he didn't read the directions WHICH WERE PRINTED ON THE MACHINE.

The brass at the office started to scold me for unloading on him...until they saw the mess he created that I had to spend the rest of the day clearing up. He was barred from ever having anything to do with toner ever again. He was sharp and smart in some ways...but was an astonishing lummox when it came to anything doing with technology, or something requiring reading instructions.