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

https://silicone-heating.wpsuo.com/beginner-s-guide-to-wafer-heater-what-to-know-before-you-specify-one

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 polyimide heater works best when these parts are planned together