Shower Tile Cleaning

I bought this apartment 6 years ago. I recall the weird swirl stain on the floor of the shower. The other stains are trying their best to be permanent. The dark spots under the shower head and caddy grow over time but when I scrub them they only shrink so much. The stains are only on the side w the shower head. Could it have something to do with the soap dripping from up above?

I had a monthly housekeeper who never made a dent in these stains.

Any ideas from the community?