This is just a thought and something you might want to look t.

How long would it take for the alcohol in the wick, even a fiberglass wick, to completely evaporate?

If it didn't evaporate one might have a slow drip of alcohol in the pack as one hiked. I've never used a wick in this manner so have no idea. Maybe the heat of the stove or just the volatile nature of alcohol causes it to evaporate before its packed so this is a non-issue.