what was the first hint?
At first your heart skips a beat then you quickly realize the malfunction. LOL
I've bought a couple dozen over the years. I have these in all my outdoor boxes too. And in my cars, snakes cages, etc... I don't really know how old it is. Somewhere between 6 months and 4 years.Failing like that seems most unusual.
I had one where the screen went black.
How long was it in use?
Yes! And then freeze them too!Now you can bake cookies in your tortoise enclosure