black grout off stone coloured tiles

[in2minds]

been scrubbing all day and got most of it off with soap and water, scrubbing brush, sponge, heavy cloth, and huge amounts of elbow grease but there's that last little bit, like ground in dirt, that won't budge

anyone got any ideas ?

btw, they're ceramic floor tiles

thanks LJ

[John]

Are you in a hard water area and in the habit of washing the floor a lot. If so it could be a build up of mucky lime scale, which sticks like concrete. Try some descaler, like toilet descaler or bathroom limescale remover. (in a small area first). It works wonders on my shower tiles.

j