I use a spray bottle because my new iron never seemed to dry out in the water tank, even after draining it and propping it upside down all weekend. I was worried it would get moldy or stinky and make my fabric or ironing board stink. I love the new iron though -- a cordless Panasonic NI-WL600. It's so easy to use and the steam feature worked great! It heats up fast and stays hot a long time, no spitting of steam when I was using it in there.
Also, I put a little unscented Best Press in my spray bottle. I think it makes the fabric nicer.