You might be right, it may be urates, the stains only occur underneath the paper towel though and I do not think I've found them on the cool side of the tank before.
I am new to snakes in general.
I'm using two or three thick paper towels.
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Ok cool, I'll go turn down the temps then until we are at that. I'll also measure the temps from the actual floor of the cage instead of ontop of the paper towels.