I had similar experience. Time in the micro coil thread broke me through to the other side.
Here's the video that did it....
Rewicking a micro coil with cotton - YouTube
This was 2 weeks after I got 40ft of high grade silica. Now it just sits..
I don't boil the cotton. IMO, it's not necessary. I do it about like the guy in the video, except I might use a bit more cotton. The trick, for me anyway, is to not fool with the cotton too much. You don't need to twist it until you make a piece of yarn out of it. Leave it fluffy. Just twist the end enough to get it started through the coil; and then trim that end off after pulling it through.