Write an article based on this "Fill a sink or bucket with hot water. Wait several minutes."
The water needs to be deep enough to completely submerge your jar. If you are remove the label from more than one jar, the water needs to be deep enough to cover the largest jar. The hotter the water, the better it will dissolve the glue under the label. The longer you wait, the more time the vinegar will have to dissolve the glue under the label. About 30 minutes should be plenty for stubborn labels, but you can check your jars after 10 minutes.