I am actually cleaning 2 different cells this morning. First is mine, which is almost 1 yr old, but I know my water has been balanced since we got it there after start-up. The last time I checked it, it did not have any build-up, so I did not clean it, just reinserted it and cleared the alert on the prologic. Chances are I may not need to clean it again. How long can one reasonably go without cleaning it if it looks like nothing is on it?
The second cell is my mother-in-laws. They just bought the house recently and the pool was a mess when they got it. Her cell is a pentair and is saying low salt even though the Taylor salt test is reading 3600ppm. I suspect her cell is failing, but I am going to clean it first to see if that makes a difference. Her cartridges were an absolute disaster when I cleaned those, so I suspect she has a bunch of build up on her cell. So this will end up being my first experience actually cleaning a cell.