Unless your grout has been sealed properly there is nothing that will keep it clean. Many people resort to bleach or even acids to try and remove stains which will, in fact, damage the grout. GroutPro specialises in sealing the grout so that mild eco-friendly cleaners are all that is needed to keep it looking in tip top condition. If your grout is already stained we can recolour it and seal it with our Colourseal sealer.