There seems to be a lot of conflicting advice, but the cells are pretty much all the same: Titanium strips plated with ruthenium that facilitate electrolysis.
Some say 4:1 acid bath only, but it eats away some of the coating so don't do it very often - But you have to clean it or it won't run due to giving the control box bad feedback.
Some say it's OK to use a tool:
* Wooden tongue depressors
* Wooden popsicle Sticks
* Wooden dowel
* A brass rod
* Butter knife
All of which some say may scratch off the coating.
Disposing of the left over acid - being as hard to dispose of as it is:
*Don't pour it back in because it has the calcium in it
*Pour it back in to your pool - there is not that much calcium in the scheme of things.
*Walk through the living room to the toilet with a bucket of acid, trying not to spill it.
*Fill the yard up with foam by adding baking soda to the acid.
*Pour it in the street drain inviting the sewer people to beat you with rubber hoses...
I hope the experts on this site will dive in and help reach a consensus as to what is the best way to clean a SWG and not shorten it's life.
The obvious solution is to use borates, keep your CH down, and TA in line, but that is preventative. Many visitors visit to solve and existing problem.
Thanks in advance.