my iron is a cheap one from meijer. I've had it about 4 years (?) I don't empty my water, but don't always fill it up. Like a PP, I usually keep a spray bottle handy and spritz my fabric. I have had a time or two to do the self clean function on my iron from not emptying the water. Essentially, I turn the iron on really hot for 2 minutes, then shut if off, turn the steam selection to the self-clean icon and hold it face down over a sink.