I already know not to say anything of substance in an exit interview. My question is - how do I do that effectively?
My impression is that most exit interviews are conducted by HR staff that don't really care that much and are just filling out a checklist. However, I work (for the moment) at a small startup. There isn't even a single HR employee. My exit interview will be conducted by my manager and the CTO. I think that they have pretty good BS detectors, and I think that they could connect the dots and realize that I was unhappy - it's not just that I have a great new offer, I went and found one for a reason (that I don't want to share).
What strategies are there for approaching this? I had a similar situation in the past, and my manager seemed skeptical that there was truly nothing wrong with my experience at the company.