This depends on its finish. For Stainless Steel plant pots, use a soft, clean cloth and mild soapy water and gently rub it over the surface of the product in a circular motion. Do this from time to time to prevent an unnecessary build-up of pollutants.
For our Smooth Brass, Copper, and Nickel plant pots, avoid using any form of chemical cleaner. Instead, use a soft, dry cloth and lightly buff the surface in circular motions to remove any smear marks.