1: The glue has a solvent that evaporates when exposed to the air, hardening the substance.
2: Dry fabric reflects more light than wet. Water changes the surface of the fabric and changes the way light reflects (refraction or something similar).
3: Something about the light reflection filters out...
@eyadmar because he plays in the damn NBA, that's why. And he makes millions of dollars. I'd let him coach any team/sport he wants.