Have you watched the video on the DH website? If not, here is a video they posted on their youtube channel:
https://www.youtube.com/watch?v=MqaYtXKeIyk
For me, I:
Heat, tap, heat tap, repeat until they are on and once they are, if they have lost their color I allow to cool a bit, then reheat just the murrini to clear, then strike as needed, and last thing if I remember I allow to cool a bit, then put a little reduction flame to them.
I am sometimes more successful than others, but it always makes me smile when they are pretty!