Spray durgol bathroom cleaner on to the surface, using a sponge to spread the solution across larger areas. Allow to work for max. two minutes, then rinse thoroughly with cold water. Repeat procedure on surfaces with heavy limescale. No need to wipe dry.
For use only on cold, intact and acid-resistant surfaces. Porous surfaces (e.g. grout) should first be wetted with cold water. Take care when using on coated or finished surfaces (e.g. decorative elements). If in doubt, test on a concealed area first.