Anyway - how do wash balls work?
I already said that they need to be "charged" by the sun every now and then (every month, see how to use washing balls) to increase the energy in the chemical pellets in the ball. Then what?
These pellets inside the ball emit infra red rays that break water molecule's hydrogen combination into smaller water cluster and activate the small water cluster. This increases the molecular motion of the water, water easily penetrates the fibers and the washing power of the water itself is increased.
The wash ball also radiates negative ions that soften the fibers in your clothes so the dirt can come out faster and easier without the use of detergent.
Wash ball also eliminates the chlorine from the water. This helps save the clothes (colors and elasticity). By doing this it softens the water and soft water has lower surface tension and is better for any kind of washing.
Balls also keep the water at the same pH spectrum that normal detergent has, so it can remove oils and dirt.
That is basically all that wash ball manufacturers tell us. I am not that good at physics to tell if this is just baloney or is it true :). I did find and post another post about these that is more sceptical and that it seems was written by someone that knows what he is talking about.