My Rowenta said not to use distilled water because of the sediment in it. What??? That's the point of distilled water, removing the sediment. My Rowenta also wanted the water removed after use, which I did. But it didn't matter, it still leaked. Now I have a Reliable brand that wants distilled water or at least softened water, so that is what I use. And I empty the water out after use. They cost too much to treat badly.