If you're already weeding through the code, why not invite the coworker to sit down next to you? In my experience, sometimes all someone needs is a pattern to adhere to, and once you show that pattern things might work out.
Of course, this is only good about 80% of the time. Sometimes people just don't get it.
Of course, this is only good about 80% of the time. Sometimes people just don't get it.