Heating

I just got my first ball python last week. I set up the tank with a under the tank heater and an infared heater, but the thermometer only reads 75. How can I fix this?

What kind of thermometer do you have? If it's one of those stick on analog thermometer then throw it away. get yourself a good digital thermometer...i have an acurite that was about 13 bucks at wal-mart

We need more details to help.

Cage size?
Heat source?
Room temperature?
Cage placement?
Substrate?