gale

My old iron said only untreated tap water and empty it every time when you're done. So that's what I used and after the first few uses, it spit rusty water on my fabric. That was after I emptied it every time I used it but of course you can't 100% empty it and whatever drops are left in it dry, only to be rehydrated the next time you fill it.

So now I never use steam. I just use a spray bottle of water (or water/vodka) or magic sizing.