Is the frog captive bred or wild caught?
What accents do you have to create where a tree frog lives? Items such as branches, tall broad leaf plants, and vines come to mind.

What do you use to clean the surfaces in the tank and what is your water source? After you clean do you rinse with dechlorinated water to remove chances of chemical residue from the cleaning products?

If your frog has no place to feel secure and hidden, it is going to attempt to escape to find those places. Also, is the tank in a high traffic or low traffic area? Sudden disturbances from outside the tank such as loud noises or sudden movements will make the acclimation process longer.