Friends of mine moved to Tbilisi, Georgia (the country, not the other one) and discovered the locals don't waste money on windshield wiper fluid, they use vodka - it doesn't freeze and is 100% (or proof) natural! Drinking & Driving means something entirely different there.
This is a wonderful Instructable with its easy-to-read, conversational-style explanations, simple and concise directions, excellent photo documentation of the steps. I've added this to the list of projects I actually want to do. Rock on!