Dollmanron
Super Freak
The reason is sunlight, Watson.
Ultraviolet.
But god only knows what that yellow orb in the sky is . . .
Its light, heat, and moisture, I keep mine out of direct sunlight or out of the light (except artificial) as much as possible, I keep my place warm in the winter and cool in the summer and they always stay dry and away for any room where water is used.