Temperatures & humidity
A Word about Humidity
Almost everyone panics about humidity. There is no reason to panic 99.999% of the time. The average humidity for a dragon is 20-60% or even up to 70% or a bit higher isn't an issue. Personally, unless humidity is 90% or higher 24/7, I wouldn't take any action. High humidity does not cause respiratory infections. Respiratory infections are caused by bacteria combined with quickly changing temperatures and drastic fluctuations in humidity, along with a weakened immune system. Humidity naturally fluctuates. It will increase at night, when the lights and heat are off and will then gradually drop again during the day. Dragons do need some humidity. I see people telling others that there should be no to 5% humidity. Actually, constantly and intentionally forcing humidity to 0 or just a few degrees can also create problems over the long run, such as retained shed and other issues with living in an environment that's actually too dry.
Basking Temperatures & Their Importance
One of the main causes of death in babies is attributed to dehydration, primarily caused by basking temps that are way too high. I bask all of my babies at 100-105 degrees. My older dragons stay around 100, within a few degrees either way, depending on the dragon. Some like it hotter, others like it a little cooler and you will be able to tell by the way your dragon acts and responds (primarily through appetite and activity levels based on heat level).
If basking temps are too low, dragons won't want to eat, will be lethargic, and won't digest properly when they do eat. Heat is required for proper digestion. If temps are way too high, it creates a condition where dehydration becomes more likely (again, especially in babies and young juveniles), and also affects appetite, where dragons have issues keeping their appetites strong. You want to maintain basking temps at a proper level for all age dragons.