Cleaning Ceramic Tile and Grout
The Ceramic tiles and grout were treated using a strong 2:1 dilution of Tile Doctor Pro-Clean which is a strong alkaline Tile and Grout cleaning product. The solution was decanted into a bottle with a trigger spray attachment which when sprayed onto the wall allows the cleaner to mix with air making it lighter and allowing it to stick better. The solution was then worked in using a stiff scrubbing brush by hand before being rinsed off with water; this process was repeated a number of times until we had managed to clean all the areas and then left to dry.Grout Colouring
The grout looked better but I was unable to shift some of the staining so we decided to apply a white Grout Colourant, it’s a time consuming process but I think you will agree it made a big difference. Additionally the grout colourant product we use also forms a barrier over the surface making the grout much easier to clean going forward. The last step was to remove the silicone sealant from along the top of bath and replace with new.Source: Ceramic Tile Cleaning Tips and Information