Something as simple as the water you put in your iron probably doesn't cross your mind; however, if you want to avoid limescale build-up and stains on your clothing, you may want to consider it.
With daily cleaning habits and weekly home deep cleans, smaller household issues like the water you use in your iron can easily fall by the wayside. If you've ever cleaned your iron properly, you've probably noticed it builds up limescale pretty easily, especially if you live in a hard water area and use tap water to fill your iron.