It is not necessary to empty the water from the iron after every use. Tap water can be used, unless the water in the area is very hard, which will reduce the performance of the iron. In this situation, it is best to use demineralized or distilled water. If you do not use your iron frequently, we recommend emptying the water reservoir, turning the Fabric Select Dial and Steam Lever to O/Off and allowing the iron to cool before putting it away.