I've been using distilled white vinegar as a rinse aid in my automatic dishwasher for several months. I've seen people all over the internet touting it as a great idea. I was hoping I would be impressed, but unfortuantely, I am not. I was hoping I would have a cheaper, environmentally friendly alternative to rinse aids like jet dry.
Maybe I'm judging it by the wrong criteria, though. While using vinegar, I didn't typically have spots on the glasses. I have started to notice an obvious clouding on the glass. If vinegar is supposed to help prevent that, it's doesn't work for me, at my water hardness.
I'm going to go back to using Jet Dry, in hopes it can remove some of the cloudy film. Interestingly enough, in all the years of washing dishes by hand, a cloudy film on the glasses was never an issue.
Go figure - automatic dishwashers AREN'T the miracle they might otherwise appear to be!