Yep... nope.
Corns need a heat source! Mostly in order to digest food. A thermostat set at 85F for a UTH is often suggested. Hygrometers are important as well. They definitely don't require as much attention in that department compared to balls though.
If it hasn't shed in 4 months, I STRONGLY presume something is amiss. At it's age (if it is indeed 5 months) is should have shed about 4 times by now.
www.cornsnakes.com is fantastic. Or send her the Cornsnake book by Bill and Cathy Love - they are awesome, and actually frequent that forum as well.