I can't be sure if its the coil, could just be me. The weather here is a bit whacky at the moment, was blazing hot yesterday after some good rain on Sunday, was in and out of the airconditioned shop, today is cool and overcast, that could be the cause of the scratchy throat. I've just replaced the washed coil with another used coil that I rinsed out yesterday, will let it soak up juice and try shortly.Thanks for sharing your experience @BumbleBee
It seems that people are having mixed experiences with "washing" the BVC coils. (with or without vodka)
Some say it works and some say it destroys the coil.
I haven't tried it yet - but by the sounds of @BumbleBee's experience I'm not likely to