I dont keep beardies but I keep snakes.
Have you got a picture of the setup?
What are you using to heat the viv, bulb? ceramic?
is it on a thermostat (THIS IS CRUCIAL)
have you got a UV, if so what percentage, i believe UV is used 12hrs a day, so on in day, off at night
What thermometer are you using (PLEASE DONT SAY A DIAL ONE, they can be up to 25c out!!!)