Before anybody else jumps in and says anything rude I'll say it nicely.
If your UTH is hot enough to cause a burn on your snake then you have it set way to hot. What I would do if I had an UTH on an aquarium for a BP is keep a shallow bit of aspen so that way the heat gets through easier and doesn't have to be hotter, then he may not push all of the shavings out of the way. I still have almost all of my bp's do this.
My bee is the biggest one taht will do it, but my black pastel & spider do it as well. I haven't had an issue with any other ones doing it as of yet. Just a thought for measure.