How to Remove Labels From Glass Jars - Woodlark Blog 2. If your jars have paper labels, submerge and soak in hot water for about half an hour. The label should peel right off. For coated labels, boil water in a kettle and place your jars into the sink. Pour the boiling water directly into the jars and let sit for 15 minutes before peeling the label off. DIY Natural adhesive remover