You can not use your hand to measure temps for your snake. If it feels warm its probably too hot. Get hourself an indoor/outdoor digital thermometer that measures humidity as well and put he probe that normally goes outside on the top of the glass above the UTH. That will tell you the temp that your snake is feeling. Again your hand is 98 degrees. Its very hard for you to judge temps that are in the 90's.
Here is an experiment for those that don't believe. Check the temp of the room you are in. Now pick up a ceramic mug, or an empty glass. You will notice that some things at room temperature feels a little cold to you. How it feels is not a good way to tell temp. Something feels cold if its taking heat from your body. It feels warm if its a little below your body temp to a little above. If its way above it feels hot. Place your hand on something metal in your room and then place it on a newspaper. The metal feels colder even though they are the same temp because the metal is conducting the heat away from your body faster than paper.