Using Glass Heater in Dusty, Damp, or Demanding Settings

https://thin-heaters.evergrovio.com/posts/installing-a-polyimide-heater-practical-steps-for-better-heat-transfer

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