water ring removal

How do you make your coffee? I like it very hot and with one teaspoon of sugar on a cup, a teaspoon of cream, and 3/4 teaspoon of instant coffee. Although its easy to make it, the water that runs through the coffee maker leave white hard water ring inside the coffee maker glass. How to clean it is not a big deal to me. Just pour two cups of water inside the coffee maker and add vinegar enough to fill the glass with warm water along with the vinegar mixed in it as it go down into the glass. Leave it for few minutes then let the vinegar work its magic to it. Use non abrasive scrub pad to get at any bits that haven't dissolve. Then rinse well with water. You'll see magic that will happen to your coffee maker. It's like brand new again.