HG Grout cleaner removes stubborn dirt from grout in floors and walls in, for example, the bathroom, toilet or kitchen Buffered and synthetic cleaning product Extremely concentrated Restores the colour of the grout Dilute in lukewarm water at a 1:4 ratio. Apply the floor grout cleaner to the grout with a brush/sponge. Let it work for a bit, scrub with a brush and wipe away the loosened dirt and rinse with water