Troubleshooting How to clean the water tank of my Philips Steam Iron? It is very easy to clean your Philips Steam Iron's water tank. Please read the instructions below. Cleaning the water tank of your iron Follow the steps below to clean the water tank of your Philips Steam Iron:1) Fill the water tank halfway with warm water and shake it carefully.2) Empty it and rinse well with fresh water (do not use detergent).Note: Algae can form when water remains in your iron’s tank for a long time. Emptying your Philips Steam Iron's water tank regularly will prevent the formation of algae or residue.