How to remove water mark staining on ceramic tiles?

turnitround

I recently moved house and the bathroom is not too my taste but ok so I don't really want to have to start replacing yet. The tiles are white around the top of the walls and black with a silvery thread running through on the lower half of the room. 
The white tiles are fine but the black ones have ingrained water marks all over them, especially in the shower enclosure. I have tried all kinds of cleaners to try to get the marks off but nothing seems to work. When I first clean them they look ok whilst wet but as soon as they are dry these horrible streaks appear again. Makes them look as if water is pouring down them when it is not.

Anyone have any ideas of a good product which may bring them back to life please, I've tried all the usual supermarket products. Thank you.

EmmyLou30

Have you tried some Cilit Bang - the limescale one? Sounds like limescale residue to me.

turnitround

Thanks EmmyLou, I have tried Cillit Bang but it has done nothing. I think it is limescale but clearly it has been repeatedly left. The whole of the shower unit looks like when you look through a rain streaked window. Because the tiles are black all the runs are greyish. 

Belenus

Try Kilrock gel limescale remover.

It is viscous so will cling to vertical surfaces better than a liquid.

Ebe_Scrooge

Assuming it's limescale (which it sounds like it is), then any of the many limescale removers should do the trick - may need several applications.

As @Belenus suggests, if you can find one that's more a gel than a liquid this might help.

What you could also try is to soak some kitchen paper in vinegar, then stick that to the tiles.  Hopefully it'll stay there, and if you can leave it overnight then it may help.

For removing limescale, basically any acid should remove it.  It's the acid in limescale removers that's the active ingredient, but things like vinegar, lemon juice, even Cola often work.  For the vinegar or Cola options, just use the cheapest own-brand stuff you can find in Aldi or Lidl - this is, after all, a money-saving site

Doozergirl

I've used these successfully on shower glass as well.   Takes some elbow grease.  

https://amzn.eu/d/bNydUyJ
The marks disappearing when wet is an obstacle to getting things properly clean.  Assume it's still there when rubbing! 

floppydisk1

Try HG limescale remover  concentrate. By far the best I have used. If possible let it work for 30 minutes so wet kitchen roll and stick it on as stated earlier, or spray / wet every few minutes and 30 min later rub and scrub.