5 Ways to Remove a Jar Label - wikiHow If the label is stuck firmly to the jar, soak the jar in warm, soapy water for a few minutes, then peel the label off. You will likely have lots of paper and/or glue residue left over, which is fine. [5] 2 Mix equal parts of baking soda and oil. You can use any cooking oil, such as canola oil, olive oil, or vegetable oil. [6]