Cleaning shower floor tiles

[mommybear1]

Hello

I'm looking for any tips/tricks or the answer to how best to clean my shower floor tiles. They are slightly bubbly in terms of texture due to their anti slip nature but as they are black they are showing everything. It seems that soap and shampoo have "stained" the tiles and try as I might I can't get the marks out or restore the floor to its original glory. It's only been down for a year! So far I've tried;

Steam cleaning;
Scrubbing with a hard brush and fairy;
Scrubbing with a hard brush and bleach;
Scrubbing with a hard brush and Vikal;
Scrubbing with a hard brush and Flash;
Scrubbing with a hard brush and Method;
Finally I have also tried a windolene as I'd had that recommended to me.

Nothing is shifting the soap marks!

Pictures attached.

Have you got hard water? That looks like limescale not soap marks.Try scrubbing with vinegar or citric acid.

This to get rid of any pink/black mould first: www.wilko.com/en-uk/cif-perfect-finish-mould-stain-remover-435ml/p/0474235
Then this this get rid of water marks: www.wilko.com/en-uk/cif-lemon-cream-with-micro-particles-500ml/p/0059554

These are the only things I use in my walk in shower and it's spotless (for a few days after cleaning it!).

@BlackForestCake yes we do have hard water I'd put this down to the soap as there are specific "lines" but I'll try the vinegar etc thank you.

@SchoolNightWine thank you I'll give those a go after the vinegar!!