Hi, I bought a new cobra heat mat a few weeks ago. I lost the instructions for it too. But I got it out 3 days ago and I put it under my tank, plugged it in and threw a digital thermometer on it with a min/max setting. It gets up to 89F in the day (might be rising from outside temp too). It drops down to 69F at night. It says it is designed to run at 100F constantly. Is is defective, did I set it up wrong, or is there any way to put more heat back in tank? The tank is on a wood stand with spacers under corners so cord isn't pinched. I was thinking about putting a piece of foam insulation behind it but is that gonna cause a fire? Like I said I lost the instructions but I think they said something about doing that. But I think I am still going to go get a ceramic heat emitter.

