Watching this video, I can’t help but think that the best instructions are no instructions. For example, it’s not a crazy thing to design the software so that the controller can work in either port. The contrast knob on the Game Boy really had no need to go down to completely blank. And the copy-protection chip that Nintendo used was the root cause for many of the “cleaning” issues.
That’s not to say that there aren’t bad customers, like the guy with the console covered with sticky stuff, but good design goes a long way towards resolving these types of problems.
