Ball Python laying on Heat Mat?

[Arcapello]

If the heat mat is only 86 then there is no possibility of him getting burned. How are you checking the temps? It is normal for him to move aspen around that's why you want to measure the actual surface on the glass where the heat pad is, not the air temp.

I'm using an Acurite thermometer/hygrometer, with the probe stuck to the glass directly over the heat mat. Is it okay if it's at 90 or 91?