We have had ceramic heaters for the wax maxer last 9+ months. The key to this is that one does not let it overheat. Overheating it will crack the ceramic and break the heater. This is for any heater that can overheat.
The wax maxer can overheat so it gets hot fast. It also will NOT overheat if there is enough oil in the chamber. The oil helps to prevent the heater from getting too hot.
Here are all the parts for the Wax Maxer and our other heaters.