Through clean of tile grouting - best things to use

[EducatingRosemary]

I have tiled floor throughout downstairs which gets hoovered every few days and mopped weekly. Tiles look clean but grouting looking grubby in places especially in the kitchen.

Also splash back behind the hob is small tiles. Tiles are wiped as needed and washed weekly but grouting is dirty.

Finally bathroom wallls and shower are tiled and again grout no longer looks clean.

Floor tiles are sandy colour grout. Wall tiles are light grey grout.

House was new build 7 years ago. What do I use, buy to do it. It may need to be a room (or wall!) at a time if we are talking toothbrush and scrubbing. Never owned or used a steam cleaner - would that do it just as well? Or is there a winner of a product that would do it best. Tiles are mid/dark colour so nothing that could damage them.

White toothpaste and a toothbrush. I did this when we bought our house and the previous owner’s dogs made the grout practically black. Sainsburys Basics had a really cheap white toothpaste (we had cream tiles though, so you’d have to do a patch test on the dark tiles).

A special long thin grout brush does wonders here

For the floor tiles you need a big bag of bicarbonate of soda and a stiff toothbrush or nail brush with hard bristles. Take a bit of bicarbonate of soda and make it damp with a bit of water, apply along tile edge and use the brush to clean the grout. It takes a bit of time but not much effort and it absolutely works.

Not sure about splashback behind the cooker because, presumably there is a thin layer of grease there, even if you can't see it. I'd try a toothbrush and spray with Elbowgrease spray (the yellow one, it's like Fairy liquid on steroids for grease). Lots of rinsing afterwards. Try a small patch first.

Again, not sure about bathroom tiles. I'd try a small patch with cif, that thick liquid not the bathroom spray. Or maybe Viakal first, in case there is some limescale. Remember to rinse between different cleaning products in case they react to each other.

For all the above, you are looking to remove a layer of ingrained deposits (dirt for the floor, grease for the kitchen splashback and potentially limescale as well as dirt in the bathroom).

Our cleaner sprayed HG mould spray on our grubby grouting, and it all disappeared in about 10 minutes. I’ve spent ages scrubbing corners with toothbrushes etc, and this just disappeared it instantly. The tiles are fine too.