What is the best tile cleaner that you recommend?

[pacitanner]

I noticed that my bathroom tile had black marks, I tried scrubbing it with soap and chlorine but it still hadn’t been removed. I want my tile to be back to normal that is smooth and shiny. What is the best tile cleaner that you recommend?

 

[MarineBob]

I have had good success with Bar Keepers? Tender? powder. Probably similar to
BonAmi. Its a non abrasive that seems a bit abrasive and works well. The bottom of my tetured tub gets a bit grody and a couple of times a year my wife sends me in with that stuff and I use some foaming bathroom cleaner. Does wonders on the tub bottom with a brush so I think it would do OK on tiles.

 

[He who knows]

We use Cif, which this website suggests is like CLR or Soft Scrub?