How to Maintain Glass Heater for Stable Day-to-Day Heating

https://heater-design.swiftnestly.com/posts/how-to-test-a-silicone-heater-for-safe-and-consistent-performance

Many heating problems look like a power problem at first. In practice, the cause may be contact, heat loss, sensor position, or poor fit. A glass heater works best when these parts are planned together