I will mention a tragic incident I had with a snake a few years back in a tank with a damaged heat pad. The heat pad had cracked from age, but it was on the side stuck to the tank.. the glass tank then cracked because of the exposed wires underneath, plus the water (humidity) in the substrate above. The water in the substrate above conducted the electricity from the exposed wires below the tank into the substrate. When we got back from our 5 day vacation we discovered this. Heartbreaking way to lose a snake
1. NEVER EVER Re-Use a UTH that has been stuck to the bottom of a tank. When you peel it off, you may/will crack the wiring inside it, thus rendering it unsafe.
2. check the underside of your tank every time you change the water or substrate for cracks