New tiles, best prevention for grout discolouration?

[AbstractDot]

I looked at cleamersvyestterday and was overwhelmed by whether I needed black mould remover, soapscum remover or limescale remover!?

Previous tile grout was white but turning a dirty cream - but not mouldy.

I’d live with the cream but if you really want it white you want either a cleaner that contains bleach or just bleach.

Pick another colour or commit to regular regrouting. This is why I will never have tiles. After a few years they look shit.

It's a local authority house so I'm just grateful they changed the tiles from the horrible clinical looking square ones I had to bigger rectangles! Its a large portion of the bathroom that's covered. I can't make permanent changes to the grout colour, I doubt they'd give permission, so best to just keep it as clean as I can. I do have white grout pens that I've used before but I'm hoping to not have to use them by just keeping the grout clean. A bleach based cleaner does make sense I was just wondering if there was some super cleaner designed for grout and tiles. Thanks