Why the temperature of the mat surface is so low and changes so much?

If you keep the mat uncovered without a protector pad, much of the heat dissipates into the air. Once you lie down on the mat or cover it, the temperature becomes more stable.

It is very important to cover the mat completely while it is preheating.

If the mat is covered only partially, the temperature sensors inside different layers may receive uneven readings from various areas. This can send conflicting information to the controller and, over time, may cause it to lose calibration or operate incorrectly.

So please always cover the mat fully while it is preheating to the set level.

Once preheated, the crystals release heat quickly. If you place a pillow on the mat and measure the temperature underneath after about 10 minutes, you will notice a significant difference.