Dear @Josh and @acpart,
Thank you for your responses. Since I had some trouble accessing this site after posting my message, I ended up posting on another gecko forum and got some suggestions, but I will also welcome any more help.
With reference to cold side temperatures, the room temperature...
HISTORY:
I adopted an adult leopard gecko from PetSmart two weeks ago because it was blind. Prior to this, the gecko lived in the store for maybe five months in a 10 gallon enclosure with an overhead heat lamp during the day and a night lamp at night. It was fed a diet of crickets until it began...