I have noticed over a period of time that the white grout between the mosaic tiles on the shower floor are going dark grey in a few areas. What should I put on it to make it white again.
Lakeland online site - mould remover, have forgotten the brand - spray on and leave - but do wear protective gloves and stand well clear. It is absolutely brilliant! It's basically mould causing the white grout to turn grey/black. Really recommend this product .... been using it for a few years now.