Again, I have to ask 'why?'
99.9% of liquids are much more water soluble than alc soluble.
Water is not a very good cleaner for anything. That's why there are dish soaps, dishwasher detergent, and many other surfactants. Do you take a bath or shower sans soap? Of course not. Does your toilet get nasty? Why, if just water is so good at cleaning?
Obviously, we can't use scrubbing bubbles disinfecting kitchen/bathroom cleaner on our tanks. But we can use alcohol, which is water soluble. Even that is not the perfect answer. Artificial flavors are petroleum derived. And natural flavors are derived from plants, as are many oils. Oil and water don't mix very well. Actual petroleum solvents might work better. Perhaps acetone, toluene, etc. Unfortunately, oil based solvents are out of the question since we wouldn't want to be vaporizing and inhaling residues. Thus the compromise with alcohols. Which are readily removed by rinsing with water. I use Everclear (90% ethyl alcohol), but 90% isopropyl alcohol would substitute. Both are easily rinsed out with water. Vodka, like most spirits, is only 40% alcohol, 60% water. Not worth the bother.
But we're really talking about cleaning the burnt residue on the coils. Not e-liquid itself. Neither water or alcohol seem to work very well at that.
best regards, larry mac
p.s., Oh, and e-liquids might just be
more soluble in alcohol than water. Alcohol is pure and very light. Soluble in both water and oil.Water (except distilled) has many impurities. Minerals, salts, heavy metals, chlorine, fluoride, phosphates, nitrites, ammonia, trace medicines and hormones, algae (especially in the summer, but it's an oily byproduct from algae that gives tap water its bad taste), etc.