I'm wondering where you all get your alcohol for spraying on soap. I've read that it should be at least 90 proof and I'm wondering if there's a cheaper alternative to buying a high proof alcoholic beverage? If not, I guess I can just go buy a nice whiskey. I'm also wondering if 80 proof will suffice (I have some 80 proof vodka) and if 100 proof is even better than 90 proof for this purpose? Maybe one of you soap experts even has a super science geeky explanation for why this helps. And by the way, I mean that with all due respect. Thanks for your help!