Help me clean my bathroom tiles?

[Happydaze2]

White bathroom wall tiles are matt ceramic and on some of them there are cloudy patches that I can’t shift. I originally thought it was limescale but now reckon to be residual grout that wasn’t washed off properly when they were fitted (years ago). Any tips, please?

Pink stuff paste in the tub wld be gd at getting off old grout of stains i would think.

Magic sponge wld also do the job, can get both at home bargains.

Are the stains on top, or coming from ‘inside’ (in which case perhaps they needed to be sealed but were not)

I would agree re pink stuff, or perhaps fairy & a minky sponge as it sounds like if grout you just need to gently rub it off

I’m pretty sure they’re just on the surface but they are stubborn!