Since the vinegar and paper towel trick worked so well on my kitchen faucet, I thought I'd test it out on my dishwasher.
Here is the before:
And the after:
What a disappointment. I was hoping for the same results I had with the sink. The vinegar did take off some of the hard water, but not nearly enough to make me happy.
I left the vinegar on for the same time that I did with the sink too.
Oh well. Off to find a new solution for the dishwasher I guess.