Originally Posted by Dungeonwitch
I filled my airlock with 70% isopropyl rubbing alcohol which was the advice of a seasoned brewer friend even though I thought it was probably a bad idea.
You will get bad advice from seasoned brewers everywhere. Even on these forums on occasion. There are so many ways to do so many things, that opinions and methods differ. Read around, study all the different forms of advice you find and use what works for you. Just as you had a gut feeling your friend's advice wasn't the best, you will discover there are different way to skin this cat.
And I agree that none of the alcohol made it into the beer and with the use of vodka. Another thing that can happen to you is suck back, that will get the airlock fluid in the beer.