Troubleshooting Slow Heat-Up in an ITO Glass Heater System

https://heater-technology-guide.valiantfield.com/posts/how-an-ito-glass-heater-combines-transparency-with-surface-heating

In camera windows, an ITO glass heater must deliver heat in a controlled way. It uses a transparent conductive ITO layer applied to glass. One useful trait is full-surface heating. Still, edge losses can change the result