I am getting my spider ball on Tuesday so I brought my tank home today and set it up to get all the temps right. I am using a zilla UTH on a herpstat. The herpstat is setup at 98 degrees. However, the bedding is not close to 90 degrees. Should I just set the UTH to 91 and let him burrow to the glass or set it higher to get the bedding that warm? I feel like I should just set it at 91, to be safe but would like some opinions. Thanks