How do I clean dishwasher rings on my wine glasses?

My wine glasses are too tall for the dishwasher, so when we wash them we put them on their side. As a result, water pools in the goblet and leaves a dishwater ring on the inside of my glasses. They're just normal hand blown glasses and I'd really like to find a way to make them look new again. Any advice?

Just soak them in white vinegar. Then rinse and dry with a soft cloth. Incidently you can use white vinegar in place of jet dry in your dishwasher. It is less harmful to the environment and does the same job at an 8th of the price.
I learned this years ago from a book called Hints from Helouise

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