Adhesives are all made of organic chemicals (unless they are made from flour). Even if they are not toxic, they are harmful to the human body.

There are many ways to remove residual glue: for example, you can buy some essential oil and apply it on it, soak it for a while and rub it vigorously to completely wipe it off. Or you can use a hair dryer to blow the remaining glue for one minute to easily remove it.