Using ITO Glass Heater in Dusty, Damp, or Demanding Settings
https://advanced-heaters.bearsfanteamshop.com/how-to-test-a-polyimide-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. An ito glass heater works best when these parts are planned together