Hey Melody, I have one and enjoy it very much. You definitely cannot go by the dial, however what I do is hang my thermometer in the wax, and let it level out to the temp it happens to be at. If it were 180, I would turn up the knob just a little till the light kicked on the thermostat, then wait for a few more minutes to level off, then check the temp again. When I reached the temp I wanted, I took a white marker and made a reference mark on the dial and thermostat so I could set it back to the right mark after shutting it off.