Under tank heater ?
 

I have had my corns in 29gal high with top infrared heaters only and we keep our house at 67° in the winter.
So I thought I would try UTH without the top heaters and see how the vivs stay for temps.
It's working great except for my one Butter wonton stay off the heater. My other snakes move back and forth from the hit hide to the cool hide.
Today I got my Butter out to hold for a while and she felt hot to the touch. Her surface temperature was 87°.
I held her for about 15 minutes and put her back.
She stretched out for a few minutes and then went back in the hot hide.
Checked her temperature again and its 86°.
Should I consider putting some astroturf or something over the UTH? Or am I worried for nothing?
If it were a Ball Python this wouldn't concern me, but I'm new to corns. Only had them for 4 months.
Please advise.
Thanks; Pine

How hot are your under tank heaters getting? They can get overly hot if they're unregulated. You can also try moving it to the side of the viv and put a hide near it so she can still comfortably access it, but she can't sit on it. And the additional air flow will help keep it not as hot.

Thanks for your input.
I am going to move the hide so its next to where it touches the bottom.

I have two temp probes over the UTH on the glass then cover that with some reptile carpet. I don't want either snake to get right onto the glass, just in case. Finally, I threw some aspen over that. If the temp at the probes is 88F, I know he's not gonna be 88F.