The grout of the tile is adhered to the grout of the tile and requires proper brushing to clean them. The easy-to-grip cleaning brush uses hard bristles with high energy efficiency and cleaning power, making it a convenient brush head for cleaning gaps and curved surfaces of ceramic tiles. This crevice brush is designed for cleaning window frame grooves and small narrow gaps, which are usually difficult to clean. The flat brush surface makes it easy to get into the gap and clean every corner of the sink and window gaps, very practical.