White King Mould and Scum Remover (Lemon). I discovered this stuff and it is amazing.
If it’s really bad spray it on, leave it overnight, and then just wash off. If it’s thick you may need to scrub initially to loosen scum before washing off. It’s a game changer.

I wonder if gumption would work

Oh my goodness if you find a good solution please share! My grout is looking gross and so hard to maintain.

I used cloudy ammonia but use a mask as the smell is overpowering and keep the window open

I shall cotton wool balls in bleach, place on the mould and leave over night. Works wonders, removing years of mould

Exit mould and bleach will whiten the mould, making it almost invisible. However, it will also damage your grout and the mould will just regrow stronger than before. We are looking at re-grouting our shower. To keep mould at bay, I currently use a spray bottle of water with a few drops of clove oil in it.

Toothbrush and toothpaste! Any works well but the whitening ones give the best performance in my opinion! If you don’t want to use a toothbrush I’d suggest getting a grout scrubbing brush.

I saw advertised the other day use the pink bottle for clothing stains, ‘Vanish’.

This is the best Grout/shower cleaner!
You won’t believe how shiny and easy to remove

1/4 cup Dish washing liquid
1/2 cap of laundry liquid or powder
1/3 bicarbonate soda
1/2 cup Vinegar
1/2 cup of water

Hire an expert! Sorry I’ve tried everything and nothing seems to work for me…

I second the other Mumma that Exit Mould is amazing! Does have a strong bleach scent so make sure no one needs a shower right after.

I read where a professional cleaner uses peroxide. She sprays it on and leaves it for an hour or so and then rinses off. She said not to use bleach because it eats the grout away and doesn’t really get rid of the mould. She said for really stubborn mould she makes a paste of bi carb and peroxide and put that on and leaves it on for a couple of hours, the longer the better. So I hope this helps.

My husband’s cousin told me the other day, toothpaste and An old toothbrush. I’m yet to try it

Gumption works well and only requires a small amount of elbow grease. I’m not sure of any products that work without some sort of scrubbing, so be sure to have a toothbrush handy to help lift it.

I find re-grouting works best .. nothing will really make them white again