The sad thing is... I already have the top Saran wrap and the humidity still doesn't stay up. I do have an analog hydrometer. I was going to order an analog one off amazon for $20 shipped. I saw some condensation in it a week or so ago and I wonder if it quit working? Ever since I've had issues with it. I just cleaned her tank and used paper towels and SOAKED them a long with lots of soaking wet moss and the humidity went down... something is wrong with it I think...