Our heaters can last for a very very long time. The reason for many heaters to go out is overheating. This happens when the user tries to get a hit with no concentrates in the pen. The heater will get too hot. The oils are designed to cool the heater as they vape.
A typical Wax Maxer heater can see 3-6 months, but we have seen 2 years come from a heater like this. We have also seen someone burn the heater out in 30 seconds.
Keep your heater under oils and your heater will last and last many months if not years.