My gecko toothless hasn't been eating for three feedings. He hasn't shed to recently, his heat is on, there haven't been any changes to his environment recently, and he isn't impacted. I'm thinking it could be parasites (I try to get any leftover crickets out soon after feeding and crickets don't generally stay in for long). What could have caused him to stop eating? I can't find my thermometer so I can't check the temperature, but I will be hooking up a thermostat soon.