Well Thanks everyone! Your suggestions are worth trying, I'll try the spring water and see if that helps. I can't imagine why vinegar wouldn't work, or would be bad....but that maybe Rowenta's being overly cautious?! who knows, I'm just sick & tired of the sputtering and sputtering out mineral deposits along with the water onto my fabric! I love my Rowenta otherwise!
Blessings to all,
MaryAnna