How to clean these bathroom floor tiles

[Doublevodka]

Hi all, looking for advice. I have these Victorian style bathroom floor tiles (pic attached). They are very matt. I cannot for the life of me get the white parts clean. I’ve tried white vinegar, washing up liquid, the steam mop and there are still marks on the white areas that won’t budge. Any ideas or advice will be gratefully received.

Bleach?

Look up 'HG' cleaners OP. They have a whole range for cleaning stone/tiles etc and for sealing them afterwards.

I had this exact problem with very similar tiles! They always looked so grubby. The only thing that worked was cillit bang - I'd spray it on then scrub with a brush. I hated cleaning them.

Get them professionally cleaned and sealed. They'll be a lot easier to keep clean then.

Following as have the same problem with these. Have never ever been able to get the white white again.

Thank you so much for all your responses, I will look into all of them 😊

I have practically given up and settled in my mind they have a ‘distressed’ look. Bleach and a scourer helps a bit but I’m not keen on cleaning on my hands and knees too often.

Barkeepers Friend, the powder, gets off stains on my similar tiles. Nothing else worked.