Heat mat help

[PitOnTheProwl]

My hand but im waiting for the thermoneter to arrive so will wait to have a reading and see what to do.

In case its still not 88F after getting the thermometer reading. What could i do?
Bigger mat?

115 degrees does not feel warm to most people either but people also forget we are WARM blooded.
Your snake is cold blooded and what feels warm to you might feel like walking barefooted on blacktop on an August Texas afternoon.....