Ask HN: How do you deal with interview burnout, as an interviewer?

When I have to conduct 6-7 tech interviews a week, with sometimes 3 interviews a day, I am feeling more burnout than with other work duties. I also feel that I am wasting time asking the same questions all the time. Sometime I try to see this as a social experiment, to see how 100 people answer the same question or coding problem, but not much more than that. How do you "grow" or "learn" better while interviewing?