For those intellectually challenged and those who should
remember their physics, the fundamental equation for the diffusion
coefficient is :-

D = kT/G where K is the Boltzman constant, T is the absolute
temperature and G is the resistance to motion. I commend a reading of
Physical Chemistry by JN Bronsted for better understanding..

For the simple explanation, how many of you make tea, even iced
tea, with cold water? I guess none, this is a simple example of the way
in which the diffusion laws work. Hotter = greater diffusion. Within
certain boundary conditions in washing machines, hotter = cleaner faster.

Lesson over.