Using Kapton Heater in Dusty, Damp, or Demanding Settings

https://electric-heaters.almoheet-travel.com/maintaining-and-troubleshooting-a-ito-glass-heater-in-daily-use

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 kapton heater works best when these parts are planned together