What cleaners to use for FG above water line?

Im kind of OCD and see everything even though I dont know what caused it yet. My CSI and LSI numbers are okay. Im thinking body oils and powdery dust from the stone work but not sure yet. Do products like Clean and Perfect help or just a waste of money? I will look into Magic Erasers as I've heard that one before. Just looking to keep things clean and shiny as I'm paranoid about staining and stuff.
 
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