Booklice has been created in my Beardy Dragon cage. In order to exterminate this insect, cinnamon is said to be effective, so I'm going to spray cinnamon powder on the cage, but is that okay?
Based on what I'm seeing, cinnamon is not harmful to birds, so it is not likely toxic to dragons. That said, it might be best to try to reduce humidity and remove anything with mold to get rid of booklice. I've found that to be effective against grain mites as well. https://extension.psu.edu/booklice