What is the ideal temperature for keeping mealworms healthy and active?

[Naato]

It recently became winter where i live and all my mealworms are just inactive and don't really move so my leopard gecko refuses to eat them, i had to switch to crickets but they smell really bad!
Does anyone know of a way to keep my mealworms active during the cold weather? and also the ideal temperature.

 

[Ozy]

I hate crickets also. Try Blaptica Dubia roaches. They are WAY better for you AND the gecko. LOL! I just keep my mealworms at room temp.. As long as it isn't below like 60, they are fine.. *shrug*