Dried glue can be dissolved with a variety of solvents, including water, acetone, and alcohol. The best solvent to use will depend on the type of glue that is being removed, as well as the material it is glued to. Water will dissolve most types of glue, but may damage the material it is glued to. Acetone can dissolve some types of glue, but may also damage the material it is glued to. Alcohol can dissolve most types of glue, but is less likely to damage the material it is glued to.