Wet equipment is a breeding ground for bacteria - the more they thrive, the stronger they smell.
The Bigger Problem
Some of that bacteria may be legitimately dangerous, and in some instances, life-threatening - including antibiotic-resistant MRSA, a type of severe staph infection.
The Center for Disease Control (CDC), Mayo Clinic, Dr. Oz, and every other medical authority. MRSA infections have hit athletics at every level, from Little League to the NFL.