Humidity question

[sweatshirt]

Hey guys, sorry I'm asking so many questions lately but I want to make sure that I have everything right for my snake.

I was looking into using a humidifier for the tank, but I heard that it can sometimes cause respiratory problems?

How should I humidify the tank? Wouldn't spraying just make the tank moldy and cold when the water cooled?

I use aspen bedding. Also, I have a UTH on the warm side and a lamp that covers the whole cage, but it gives off minimal heat. It's mostly just for lighting and I turn it off during the night. They're both connected to thermostat but even at a high setting they both don't get very warm. Is there a reason? Thanks!