Moisture an issue?

[beanersmysav]

Sorry if I'm seeming to have a ton too many questions but as it pertains to dirt I don't know jack, and I've been trying to find me answers surfing the net through various search engines and just find way too many varied answers which is a headache and a half.

I've have the new dirt substrate in my Bosc's cage and he does love it I can tell by how much a pleasure he'd been to handle. He never squirms to much and doesn't mind getting picked up but without fail if you hold him for an excess period of time over a 1/2 hr or so he used to get a little squirmy and id hold him untill he was done then put him back after he was relaxed again, but yesterday I held him for an hour and he just laid their on my lap relaxed.

Note: He still hasn't been digging much except for in his hide and even then he just digs where he lays his head, but he is obviously more comfortable as I'm sure you all knew anyways.

But my question is, this morning I woke up and there was alot of moisture and dew on the front side of the tank, and I read online in a couple of places that moisture can be a serious issue resulting in respritory infection etc. However the humidity in the cage is still in the 40's range which from my gathering of care sheets is an ok range and it's where I've had it for 2 years now. So is the moisture going to be an issue or is it a normal thing you all notice.

Notes: Basking spot 105 degrees - Under his hide log which is under the basking spot is 90 degrees - Cool ends 80 - and in the front where the moisture is it's 80.