When I started writing the questions down, it became more of a stream, and I was worried I needed it to be like normal research, where you needed to verify every single correct fact/piece of information.
I followed advice and concentrated on what questions I wanted my participants to respond to, and focus on the variables that were important.
I did narrow it down, but I still did repeat myself quite a bit, and one question confused both the participants, but it lead to further conversation breaking it down, and in the end was generative for the data and end responses.