Maybe. The oldest ones i have are probably between 3-4 years old and they have warped. Between those old ones and newer ones i ordered probably about 2 months ago for my dumerils, they seem the same. On that note, those ones have stayed straight while the 2 i ordered for my BCL like a month ago, the one on the cool side has warped while the one on the warm side is still flat.....go figure lol.
Maybe the snakes at night are using them for 'workouts' by constricting them and they warp lol :P






