The best way to clean a Rowenta iron is by using the Rowenta iron cleaning paste. If you don't have access to the paste mix a tsp. of salt, tbsp. of baking soda, and add white vinegar until a paste forms. Rub the paste on a cool iron, turn iron on high and iron over an old towel using steam. Once completed wipe the iron (when cooled) with a clean cloth.
The easiest and best way to clean a Rowenta iron is to use the Rowenta cleaning paste. Simply apply the paste to a cool iron and then turn to high and iron a piece of double folded cloth. When done wipe with a clean cloth.