Well if it feels warm to your touch it's already too warm. Our temps are 97.f and the temp the uth needs to be at is 90-92 tops. So it wouldn't feel warm to the touch. A snake likes to keep their body temp at 88 that's why they feel cold to us. I would go get a dimmer. Home depot sells the plug in lamp dimmers that will work for the time being. Like I said earlier put the thermom probe on the glass and secure it there with hotglue. Then you will have to fiddle with the dimmer starting in on all The way low and adjust up until you reach 92.f and make sure it stays there.