Isopropyl (rubbing) alcohol is poisonous. The fact you rinse your coils in water probably negates any potential issues, but even then it wouldn't be worth the risk in my mind. We're trying to get away from dangerous chemicals, right? I've tried soaking in vodka before, but I didn't see any benefit over the boiling water/dry-burn technique I described.

I mentioned it before, but rewicking with cotton is the ticket to Kanger single-coil heads. Cleaning and future rewicking is an absolute breeze, not to mention the improvement in flavor and vapor production. I got to a point when I was still using Kangers that I would pull the silica wick out of the brand-new heads & use the cotton.