What feels warm to us compared to them is very different. It can feel cool or warm to you but can easily be to hot for a snake.
You keep saying the uth is the reason its to cool. ITS NOT THE REASON. The uth is for a hotspot not your ait temp.
You may just need to add a florescent lamp to the cage ceiling. I'm guessing your cage is a box type but since you are not helping me help you I'm left guessing.
You say you wouldn't put your snake in danger but you are. You came here for help so take the advice you asked for.