The faithfull heavy duty narrow headed grout scrubbing brush is fitted with stiff nylon bristles and is suitable for use on all tiled surfaces it is ideal for tackling stubborn grime mildew and other forms of residue in hard to reach places and tight grout lines a large soft grip handle provides extra user comfort it may be used in conjunction with most tile and grout cleaning detergent how to use thoroughly clean the tiled area with a suitable cleaner and allow to dry spray the grout with a gro