Why would mold form on elmers glue?

Mold can form on Elmer's glue due to the presence of organic materials and moisture in the glue. If the glue is stored in a humid environment or comes into contact with water, it can create an ideal environment for mold spores to grow. Additionally, leftover food particles or contaminants can also contribute to mold development. Proper storage and ensuring the glue is kept dry can help prevent mold formation.