I have a blanket around 3 sides attached with duct tape and a towel with saran wrap and foil shiny down on the screen. The towel covers half the front. They don't like being insecure. The probe can be put on the back glass close to where the uth is. He is hiding all the time because he is cold and insecure. Those analog gauges are notorious for being inaccurate. You can get a good dome for cheap at a hardware store and the red light I use is a 60 watt heat night light from a pet store. I do have it slightly elevated. I also hve 2 temp humidity gauges that I have 1 probe by hot and body by cool, and other is raised a little and same thing. Probe on cool body on hot. I haven't had any major fluxuations in temp and humidity. You can spritz aspen as long as you do it ligghtly so its not saturated. I use coco husk. It helps a little with holding moisture and notggetting saturated if done right. No you don't have to put he water on hot side. Put it in the middle and it will help with humidity. Also then it doesn't get too hot for him to drink. If you decide to put some foil and saran wrap on top keep it clear of the light you use. Its a fire hazard. Also anything you use to cover the sides can become fire hazards if they come in contact with that light. My girl is so much happier now that I did that. She will lay full length and watch through the window a while then go back to hiding and sleeping. I hope this helps you.