How can I effectively loosen wood glue?

To effectively loosen wood glue, you can use heat or a solvent. Heat can be applied using a heat gun or a hair dryer to soften the glue, making it easier to remove. Alternatively, a solvent like acetone or vinegar can be applied to dissolve the glue. Be sure to follow safety precautions and test a small area first to ensure the method does not damage the wood.