"Sometimes things get stuck in the plates when I'm fighting," he says, pressing where the metal slides over itself like scales. "Blood, dirt - it can get dangerous because I don't know if I'm ever going to end up frying the motor in it or however it works."

He doesn't know nearly enough about how his arm works and while he loathes it, he also recognizes it as a necessary tool.

"So if we could figure out an easier way to keep it clean, that might be helpful."