We have a smiley on our living room table.
He is quite picky, hardly ever wants to smile.
The temperature must be between 18℃ and 25℃, and the humility must be between 40 and 50. Today, he is not smiling, as the humility is under 40.
It was quite hot and humid all summer, and at last, smiley started smiling, but now it is too dry for him.