Please Help me. Hi, I took the cover off my intertherm thermostat because I was painting that wall

Question

Hi, I took the cover off my intertherm thermostat because I was painting that wall and I did not want to get paint on it. I also removed the dial, which you use to adjust the temperature. I tried to put the dial back in but it does not seem to be in their very tight. My heater is not stuck in the on position at 90degrees! Please help me. How do I get the dial to go back in and click into the off position?Thanks soooo much!Emily