How often is it open? Can't say for sure bc my snakes have never had it but could be a sign of RI. You should also give us your setup. What your using as a cage, what your using for heat, what's your humidity level, what your using to take temps, how your taking your temps, what your using to regulate your heat devices.
Also since this is your first post welcome! Here is the care sheet, I recommend reading it and making adjustments if any are needed.
http://ball-pythons.net/forums/showt...ius)-Caresheet
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