- HG Grout Cleaner – This grout cleaner is ready to use and will remove persistent dirt from your grout. HG specializes in high quality cleaning, protection and beautification products for in and around the home The HG range offers a solution for every cleaning problem around the home. Removes persistent dirt from grout. Any yellow or brown dirt that remains after cleaning is limescale, which can be removed with HG professional limescale remover. For black deposits on grout, please use HG mould spray.