Brown tree frogs, mainly like to eat flys. Sometimes grasshoppers and sometimes mealworms (witch both can be found in a pet shop). All food that you chose to give to the frog has to be coated in calsium powder before frog consumes. if not the frog may suffer calsuim defisanitsy, or over protein. witch can lead to kidney fayilor witch can cause the frog to die. The calsium powder can be found in pet stores
Most reptiles with teeth are able to grow new ones once one was broken. It is surmised that dinosaurs were able to perform this function too.
they eat bugs/insects.
Maybe it is too cold, and it is trying to keep warm. Does the instruction manual say to provide a separate heat lamp at one end to raise the temperature significantly? I bet it does. If you have such a lamp, you could try putting a red bulb in it so it is warmer radiation than a white one. Maybe you have one, but the tank is too tall for the heat to reach the bottom of the tank. Check online to see what the ideal temperature should be in that tank and get a thermometer and measure it. Maybe it is laying eggs? Phil
Food, The light attracts bugs