I personally never clean my electrodes, I have a CS generator that reverses
current as it works.
The electrodes do get dirty but I figure the filter will catch it.
I just run each Gallon batch through 4 layers of brown (not bleached) coffee
filter.
I have a plastic hose 1/4 inch with plastic valve on end.
I drip the CS through the filters slowly.
I make batches from to 50 PPM and it all is and stays clear.
 
  Bob