I've done a couple, and they suck - no way around it.
But maybe my biggest advise is that IF you're going to ask _any_ technical questions, do this:
Make a document / powerpoint / etc. with your question and any needed information, share that screen with your interviewee.
A month ago I had a technical interview, where the interviewer (with a poor microphone and room) had a bunch of steps and commands he wanted me to do, and it was a total nightmare. He had to re-iterate almost everything, multiple times. Some questions he just skipped or canceled, due to the poor communication.
But maybe my biggest advise is that IF you're going to ask _any_ technical questions, do this:
Make a document / powerpoint / etc. with your question and any needed information, share that screen with your interviewee.
A month ago I had a technical interview, where the interviewer (with a poor microphone and room) had a bunch of steps and commands he wanted me to do, and it was a total nightmare. He had to re-iterate almost everything, multiple times. Some questions he just skipped or canceled, due to the poor communication.