Usually, if water is well balanced, you will not need to clean your SWCG (Salt Water Chlorine Generator) at all.
Also, you only need to add salt if there's lots of splash out or after doing many backwash/drain to waste.
For best results and total control of your pool chemicals, you should take care of your own water testing with a good test kit. Not hard to do at all and you'll save $$$ by adding the chemicals that you really need to have... not what the pool store tries to sell you.
Test kit:
Test Kits Compared - Trouble Free Pool
If there's algae, you should follow SLAM procedure. Again, easy to do:
SLAM - Shock Level and Maintain - Trouble Free Pool
Hope it will help you.
Christian