In my opinion, your job as a manager is to put people in position to succeed. Your job is to make their job easier - not the other way around.
Not many people like interviewing. Not many people are good at it. Your job in the interview is to allow the person to convince you that they are good at what they do, qualified for the job, and you should hire them. Amazingly, some very talented people are not good at convincing people of this in an interview.
An easy way to get to the meat of what someone can do in an interview is to lead someone down a path to a point where they can articulate the information you want to know.
For example, instead of starting with a question like, "Tell me about a situation where you had to deal with a difficult person," you can start by asking them about the types of projects they worked on. When you know about a few projects, you can lead them to that question as you learn about their roles on the project.
It's kind of like trying to get a girl to go home with you. You don't ask them to come home and get nekkid immediately, you need to finesse it a bit more.